Maintaining Personal Hygiene in the Vacuum of Space: A Comprehensive Guide to Astronaut Grooming

Ever wondered how astronauts manage to maintain their personal hygiene while floating in the vacuum of space? It’s a question that has puzzled many, but the answer is surprisingly simple. Despite the lack of gravity and the harsh conditions of space, astronauts have developed a comprehensive guide to grooming that allows them to stay clean and healthy during their missions. From brushing their teeth to washing their hair, astronauts have adapted their personal hygiene routines to the unique challenges of space travel. In this article, we’ll take a closer look at how astronauts maintain their hygiene in the great beyond, and what steps they take to ensure they stay fresh and clean. So, buckle up and get ready to learn about the fascinating world of astronaut grooming!

The Challenges of Grooming in Space

Microgravity and Its Impact on Personal Hygiene

Microgravity, the absence of gravity in space, presents a unique set of challenges for personal hygiene. In a weightless environment, fluids and particles float freely, making it difficult to maintain a clean and sanitary living space. The lack of gravity also affects the way hair, skin, and clothes behave, which in turn affects the grooming habits of astronauts.

Effects on Hair and Skin

In microgravity, the hair and skin of astronauts can become oily and greasy due to the lack of gravity-induced friction. This can lead to a buildup of dirt and debris on the skin, as well as an increased risk of dandruff and other skin irritations. Additionally, the absence of gravity can cause hair to become more fragile and prone to breakage, making it difficult to maintain a neat and tidy appearance.

Effects on Clothing

Clothing in space can become dirty and soiled quickly due to the lack of gravity-induced friction, which makes it difficult to remove dirt and debris. This can lead to a buildup of dirt and debris on the skin, as well as an increased risk of dandruff and other skin irritations. Additionally, the absence of gravity can cause clothing to become more fragile and prone to tears and snags, making it difficult to maintain a neat and tidy appearance.

Challenges of Grooming in Space

The challenges of grooming in space are many, but they can be overcome with the right approach. Astronauts must take special care to maintain their personal hygiene, as the lack of gravity can make it difficult to keep themselves and their living space clean and sanitary. This requires a specialized approach to grooming, including the use of specialized equipment and techniques.

In the next section, we will explore the various techniques and equipment used by astronauts to maintain their personal hygiene in space.

Limited Water Supply and Waste Management

One of the primary challenges of maintaining personal hygiene in space is the limited supply of water and the need to manage waste efficiently.

  • Water Conservation Techniques
    • Recycling urine and sweat for drinking and hygiene purposes
    • Reducing shower time and using minimal amounts of water
    • Using water-efficient appliances and equipment
  • Waste Management Strategies
    • Collection and storage of solid waste
    • Disposal of waste through incineration or other methods
    • Monitoring and controlling odors and microorganisms

In addition to these challenges, the absence of gravity also poses unique difficulties for personal grooming, such as maintaining oral hygiene and dealing with hair care. These issues will be addressed in subsequent sections of this guide.

Pre-Flight Preparations for Personal Hygiene

Key takeaway: Maintaining personal hygiene is crucial for the health and well-being of astronauts in space. The challenges of grooming in space include microgravity’s impact on personal hygiene, limited water supply, and waste management. To maintain personal hygiene, astronauts must follow strict protocols, use specialized equipment and techniques, and develop personal hygiene routines. Grooming supplies used by astronauts include toothbrushes, toothpaste, shampoo, and soap alternatives. Astronauts also use wet wipes, waterless cleaning solutions, and hand sanitizer to maintain personal hygiene. In extended space missions, astronauts must manage their long-term hygiene needs and cope with hygiene-related psychological factors. The future of personal hygiene in space exploration involves advancements in grooming technology, ensuring hygiene in longer and more remote space missions, and using water-conserving products.

Choosing the Right Clothing and Grooming Materials

In order to maintain personal hygiene in the vacuum of space, it is important to choose the right clothing and grooming materials. The clothing and grooming materials used by astronauts must be designed to withstand the harsh conditions of space while also providing comfort and protection to the astronaut’s skin.

Materials That Do Not Work in Space

Cotton is not recommended for use in space as it can easily become contaminated and can cause irritation to the skin. Synthetic fabrics, such as polyester and nylon, are preferred as they are more resistant to dirt and debris and can be easily cleaned.

Materials That Work in Space

Astronauts wear spacesuits made of layers of material that provide protection from the extreme temperatures and radiation in space. The inner layer of the spacesuit is made of a breathable material, such as Gore-Tex, which allows moisture to escape while keeping the astronaut warm. The outer layer is made of a durable material, such as Nomex, which protects the astronaut from micrometeoroids and other debris.

In addition to their spacesuits, astronauts also wear specially designed clothing and grooming materials, such as antimicrobial socks and shampoo, to maintain personal hygiene in space. These materials are designed to be easy to use and dispose of in the zero gravity environment of space.

It is important to note that all clothing and grooming materials used in space must be thoroughly tested and approved by NASA before use.

Developing Personal Hygiene Routines

As astronauts prepare for their missions in space, developing personal hygiene routines is an essential aspect of their training. In the vacuum of space, personal hygiene is crucial for maintaining both physical and mental health. Astronauts must adhere to strict personal hygiene routines to prevent the spread of illness and maintain cleanliness in the confined space of a spacecraft. In this section, we will discuss the key components of developing personal hygiene routines for astronauts.

  • Showering and Bathing

Astronauts must follow specific protocols when showering and bathing in space. They use a specially designed showerhead that works without gravity and recycles water to conserve resources. Astronauts are also required to use biodegradable soap and shampoo to avoid contaminating the water supply. They must wash their hair and bodies thoroughly to prevent the buildup of bacteria and odors in the enclosed environment.

  • Brushing Teeth and Oral Hygiene

Brushing teeth and maintaining oral hygiene are critical for preventing tooth decay and gum disease in space. Astronauts use a toothbrush designed specifically for use in zero gravity, which has a flexible head to adapt to different surfaces. They must also use a special toothpaste that is not activated by water, as there is no running water in space. In addition, they must rinse their mouths with water after brushing their teeth to remove any remaining particles.

  • Grooming and Hygiene for Long-Term Missions

For long-term missions, astronauts must maintain their personal hygiene routines for extended periods. This includes regular shaving, hair cutting, and nail trimming. They must also take care of their skin to prevent dryness and rashes caused by the harsh conditions in space. Astronauts use specialized grooming tools designed for use in zero gravity, such as zero-gravity nail clippers and hair trimmers.

  • Managing Personal Hygiene Supplies

Managing personal hygiene supplies is an essential aspect of maintaining personal hygiene in space. Astronauts must carefully monitor their use of toiletries, such as toothpaste, shampoo, and soap, to ensure they have enough for the duration of their mission. They must also dispose of waste products properly to prevent contamination and maintain a clean and healthy environment.

Overall, developing personal hygiene routines is a critical aspect of preparing for a mission in space. Astronauts must follow strict protocols to maintain their physical and mental health in the harsh conditions of the vacuum of space. By developing effective personal hygiene routines, astronauts can ensure their well-being and focus on their mission objectives.

Grooming Supplies for Astronauts

Toothbrushes and Toothpaste

When it comes to maintaining personal hygiene in space, toothbrushes and toothpaste play a crucial role in keeping astronauts’ teeth and gums healthy. In this section, we will explore the different types of toothbrushes and toothpaste that are used by astronauts in space.

Battery-Operated Toothbrushes

Battery-operated toothbrushes are the most commonly used toothbrushes in space. These toothbrushes are designed to be compact and lightweight, making them easy to transport and use in a zero-gravity environment. They also have a built-in timer to ensure that astronauts brush their teeth for the recommended two minutes.

Disposable Toothbrushes

Disposable toothbrushes are also used by astronauts in space. These toothbrushes are designed to be used once and then discarded. They are typically made of biodegradable materials and are an environmentally friendly option for maintaining personal hygiene in space.

Toothpaste

Toothpaste is an essential part of any oral hygiene routine, and astronauts are no exception. Toothpaste used in space is designed to be non-aerosol and to adhere to the toothbrush in zero gravity. It is also formulated to be effective at preventing cavities and freshening breath.

Oral Hygiene Kits

To ensure that astronauts have access to the necessary tools for maintaining personal hygiene, oral hygiene kits are provided to them. These kits typically include a toothbrush, toothpaste, dental floss, and a mouthwash. The kits are designed to be compact and lightweight, making them easy to transport and use in a zero-gravity environment.

Overall, toothbrushes and toothpaste are crucial components of an astronaut’s personal hygiene routine in space. These tools help to keep astronauts’ teeth and gums healthy, prevent cavities, and freshen breath. By providing astronauts with the necessary tools and supplies, it is possible to maintain personal hygiene even in the vacuum of space.

Shampoo and Soap

While in space, astronauts need to maintain their personal hygiene to stay clean and healthy. However, using shampoo and soap on Earth is not feasible in the vacuum of space. Astronauts have to rely on specialized grooming supplies designed for use in zero gravity.

Using Water in Space

One of the biggest challenges of grooming in space is the lack of water. Astronauts have to conserve water as much as possible, which means they can only use a small amount for grooming purposes. This means that traditional shampoo and soap are not viable options.

Shampoo and Soap Alternatives

To address this challenge, specialized shampoo and soap alternatives have been developed for use in space. These products are designed to be used with minimal water and to provide effective cleaning without leaving residue that could clog the station’s plumbing system.

Biodegradable and Recyclable Materials

In addition to conserving water, astronauts must also be mindful of the environmental impact of their grooming supplies. Therefore, biodegradable and recyclable materials are preferred whenever possible. These materials can be disposed of easily and do not pose a threat to the delicate ecosystem of space.

Antimicrobial Properties

Another important consideration for grooming supplies in space is the need for antimicrobial properties. With limited access to medical treatment in space, it is essential to prevent the spread of bacteria and other microorganisms. Specialized grooming products for space use often contain antimicrobial agents to help prevent the spread of infection.

Razors and Shaving Cream

In the vacuum of space, astronauts face unique challenges when it comes to maintaining personal hygiene. One of the most essential grooming tasks is shaving, which can be a challenge in zero gravity. Astronauts need to be clean-shaven for both hygiene and safety reasons, as facial hair can interfere with the seal of their space suits. To ensure that they can maintain their grooming habits in space, astronauts bring a variety of tools and supplies with them on their missions.

Razors and shaving cream are two of the most important tools for shaving in space. The razors used by astronauts are specially designed to work in zero gravity, with flexible blades that can contour to the shape of the face and a non-slip grip to prevent accidents. Some razors even have built-in lights to help astronauts see what they are doing in the low light of the space station.

Shaving cream, on the other hand, is a bit more difficult to use in space. In zero gravity, the cream tends to float away from the face, making it difficult to apply evenly. To solve this problem, astronauts use a variety of techniques, such as using a towel to apply the cream or attaching the cream to the wall of the space station and using it like a paint roller.

Overall, while shaving in space may be more challenging than on Earth, with the right tools and techniques, astronauts can maintain their grooming habits and stay clean and sharp while in orbit.

Hygiene Procedures in the International Space Station

Showering and Bathing

Astronauts aboard the International Space Station (ISS) must adhere to strict hygiene protocols to maintain their health and well-being in the microgravity environment. One of the most important aspects of personal hygiene is maintaining cleanliness through showering and bathing.

While the lack of gravity in space makes traditional showering and bathing impossible, astronauts have developed creative solutions to maintain their hygiene. Water is a precious resource on the ISS, so astronauts use a combination of wet wipes, soap, and waterless cleaning solutions to keep themselves clean.

Wet Wipes

Wet wipes are a staple for astronauts’ personal hygiene in space. They use them to clean their bodies, faces, and hair. The wet wipes are moistened with water and contain mild soap or shampoo, making them effective for removing dirt and grime.

Waterless Cleaning Solutions

Astronauts also use waterless cleaning solutions to maintain their hygiene. These solutions are applied directly to the skin or hair and do not require water for activation. They are designed to break down dirt and bacteria, leaving the skin and hair feeling clean and refreshed.

Soap and Shampoo

Although water is scarce on the ISS, astronauts do have access to soap and shampoo. They use these products in conjunction with wet wipes and waterless cleaning solutions to maintain their hygiene. Soap and shampoo are essential for removing stubborn grime and odors, and they help to prevent skin irritation and infection.

Hair Care

Maintaining good hair hygiene is also crucial for astronauts in space. They use specialized hair care products to prevent hair loss, control frizz, and promote healthy hair growth. These products are designed to work in the microgravity environment and do not require water for activation.

In conclusion, showering and bathing in space is a complex process that requires creative solutions to maintain personal hygiene. Astronauts use a combination of wet wipes, waterless cleaning solutions, soap, and shampoo to keep themselves clean and healthy in the vacuum of space.

Hand Hygiene and Personal Cleanliness

Astronauts on the International Space Station (ISS) face unique challenges when it comes to maintaining personal hygiene. With limited water and zero gravity, traditional methods of cleaning and grooming are not practical. However, hand hygiene and personal cleanliness are essential for preventing the spread of illness and maintaining a healthy environment in the ISS. Here are some of the methods used by astronauts to maintain hand hygiene and personal cleanliness in space:

Hand Hygiene

Hand hygiene is crucial in space, as germs can easily spread in the close quarters of the ISS. Astronauts use alcohol-based hand sanitizer to clean their hands regularly, as soap and water are not readily available. They also wear gloves when performing tasks that may come into contact with body fluids or waste, such as cleaning the toilet or handling medical equipment.

Personal Cleanliness

Astronauts use wet wipes to clean their faces, hands, and other exposed skin. They also use a specialized toothbrush and toothpaste to brush their teeth and freshen their breath. Hair brushing is done using a brush with suction cups that stick to the head. Clothing is cleaned using a machine that filters out moisture and releases clean air.

While these methods may not be as effective as traditional hygiene practices on Earth, they are essential for maintaining a clean and healthy environment in space. Additionally, astronauts are trained to follow strict hygiene protocols to prevent the spread of illness and maintain their health during long-term space missions.

Dealing with Waste and Laundry

  • Space is a unique environment that presents numerous challenges when it comes to maintaining personal hygiene. In the International Space Station (ISS), waste management and laundry are two essential aspects of astronaut grooming that require careful consideration.
  • Waste management in space is a critical issue, as there is no garbage collection service available in orbit. The ISS has a recycling system that can process urine and sweat into drinking water, but other waste materials, such as packaging and garbage, must be carefully stored until they can be returned to Earth. Astronauts must follow strict protocols to ensure that waste does not contaminate the station or pose a health risk.
  • Laundry in space is also a challenge, as there is no washing machine or dryer available on the ISS. Astronauts must rely on hand-washing their clothes and using a vacuum cleaner to remove dirt and debris. Clothes are then air-dried using the station’s ambient air, which is recirculated through the ISS to maintain a clean and hygienic environment.
  • Despite these challenges, astronauts on the ISS must maintain a high level of personal hygiene to prevent the spread of illness and maintain a healthy living environment. This requires careful planning, coordination, and attention to detail in all aspects of waste management and laundry procedures.

Hygiene in Extended Space Missions

Managing Long-Term Hygiene Needs

In extended space missions, maintaining personal hygiene becomes a critical aspect of an astronaut’s daily routine. With limited resources and the harsh conditions of space, managing long-term hygiene needs requires careful planning and execution. Here are some strategies and techniques used by astronauts to maintain their hygiene during extended space missions.

  • Water Conservation: One of the primary challenges of maintaining hygiene in space is the limited supply of water. Astronauts are trained to conserve water as much as possible, using only a small amount for personal hygiene purposes. This involves using wet wipes instead of water for cleaning and using a toothpaste that does not require rinsing.
  • Reduced Activity: In space, the effects of microgravity on the human body include a decrease in muscle mass and bone density. As a result, astronauts need to conserve energy and reduce their activity levels to manage their hygiene needs. This means taking shorter showers and using less water for personal hygiene.
  • Efficient Toilet Design: The toilet design on the International Space Station (ISS) is specifically designed to conserve water and minimize waste. The toilet uses a fan to evaporate urine and waste into vapor, which is then filtered and collected for reuse. The system also separates solid waste into compacted pellets for disposal.
  • Hand Hygiene: Hand hygiene is crucial in preventing the spread of germs and infections. Astronauts use hand sanitizer and wet wipes to clean their hands regularly, especially after using the toilet or eating.
  • Crew Coordination: Managing long-term hygiene needs in space requires coordination among crew members. Astronauts take turns performing hygiene tasks, such as showering and cleaning, to conserve resources and minimize waste.
  • Specialized Hygiene Products: Astronauts use specialized hygiene products designed for use in space, such as toothpaste, shampoo, and soap that are specifically formulated for use in microgravity. These products are designed to be efficient and effective while conserving water and other resources.
  • Personal Comfort: Maintaining personal hygiene is not only important for physical health but also for mental well-being. Astronauts use aroma compounds and other means to maintain a pleasant odor in their living quarters, contributing to their overall comfort and well-being during extended space missions.

By following these strategies and techniques, astronauts can maintain their hygiene for extended periods in space while conserving resources and minimizing waste.

Coping with Hygiene-Related Psychological Factors

While physical challenges are evident in space, astronauts also face psychological hurdles in maintaining personal hygiene. In a confined environment with limited resources, it is essential to cope with hygiene-related psychological factors to ensure both physical and mental well-being.

1. Body Image and Self-Perception

In a weightless environment, astronauts often experience changes in their body image, which can negatively impact their self-perception. To maintain a positive self-image, astronauts should take the time to groom themselves, including washing their hair and face, brushing their teeth, and trimming their nails.

2. Mental Health and Well-being

Personal hygiene plays a crucial role in maintaining mental health and well-being during extended space missions. Astronauts must adhere to regular grooming routines to maintain a sense of normalcy and control over their environment. Failure to do so can lead to feelings of helplessness and anxiety.

3. Social Interactions and Group Dynamics

In a confined space, social interactions and group dynamics are critical for maintaining psychological well-being. Astronauts must be mindful of their personal hygiene to avoid offending their crewmates and maintain positive relationships. Regular showers and clean clothing can help prevent body odor and promote a sense of cleanliness and freshness.

The Future of Personal Hygiene in Space Exploration

Advancements in Grooming Technology

Hair and Skin Care in Zero Gravity

As space exploration progresses, so does the need for effective hair and skin care in zero gravity. Astronauts face a unique set of challenges when it comes to maintaining their personal hygiene, as traditional methods are not always feasible in the vacuum of space. To address this, researchers are working on developing innovative solutions that can help keep astronauts looking and feeling their best while in space.

Waterless Hygiene Products

One of the most significant challenges faced by astronauts is the scarcity of water. To address this, scientists are developing waterless hygiene products that can be used in space. These products include shampoos, soaps, and toothpaste that do not require water to be effective. They are designed to clean and sanitize the skin and hair without using water, making them ideal for use in space.

Innovative Shower Systems

Another challenge faced by astronauts is the lack of a traditional shower. In space, there is no gravity to hold water in place, making it difficult to take a shower. To address this, engineers are developing innovative shower systems that can be used in zero gravity. These systems use air and water to create a mist that can be directed at the body, providing a simulated shower experience.

Advanced Clothing Materials

Finally, researchers are also working on developing advanced clothing materials that can help keep astronauts clean and comfortable in space. These materials are designed to wick away sweat and other moisture, keeping the body dry and odor-free. They are also breathable, allowing for good air circulation, which is important in a confined space.

Overall, advancements in grooming technology are crucial for maintaining personal hygiene in space. As space exploration continues, these innovations will become even more important, ensuring that astronauts can stay clean and comfortable during their missions.

Ensuring Hygiene in Longer and More Remote Space Missions

As space exploration ventures further into the cosmos, longer and more remote missions are becoming increasingly common. Ensuring personal hygiene in these missions is of utmost importance for the health and well-being of astronauts. Here are some key considerations for maintaining hygiene in longer and more remote space missions:

  • Water Conservation: Water is a scarce resource in space, and therefore, every drop must be conserved. Astronauts must be mindful of their water usage while maintaining their personal hygiene. This may involve using waterless soaps and shampoos, taking shorter showers, and using a dry-cleaning method for their clothes.
  • Hygiene Kits: Astronauts must carry their own hygiene kits, which include toothbrushes, toothpaste, razors, shampoo, conditioner, and soap. These kits must be designed to minimize waste and be compact enough to fit in the limited space available.
  • Clothing Maintenance: Clothing must be clean and comfortable, as it plays a crucial role in maintaining hygiene in space. Astronauts must be knowledgeable about the care and maintenance of their clothing, including washing, drying, and mending.
  • Personal Care Products: Astronauts must carry personal care products that are specifically designed for use in space. These products must be tested and approved by NASA to ensure they are safe and effective in the unique environment of space.
  • Mental Health: Long-term space missions can take a toll on astronauts’ mental health. Maintaining personal hygiene can help alleviate stress and improve mood. Astronauts must also have access to resources that can help them cope with the psychological challenges of space exploration.

Overall, ensuring hygiene in longer and more remote space missions requires careful planning, resource management, and attention to detail. By prioritizing personal hygiene, astronauts can maintain their health and well-being, even in the challenging environment of space.

The Importance of Personal Hygiene for Astronauts’ Health and Well-being

Preventing Infections and Illnesses

Personal hygiene is critical for maintaining the health and well-being of astronauts in space. One of the primary reasons for this is to prevent infections and illnesses. In the vacuum of space, there is no air, and the environment is hostile to human life. This means that microorganisms, such as bacteria and viruses, cannot survive in space. However, this does not mean that astronauts are immune to infections and illnesses.

In space, the human body is exposed to various environmental factors that can compromise its immune system. These factors include radiation, microgravity, and extreme temperatures. As a result, even minor infections can become severe and potentially life-threatening. For example, a small cut or scratch on the skin can become infected and spread rapidly in the absence of gravity.

Therefore, personal hygiene practices are essential for preventing infections and illnesses in space. Astronauts must maintain good oral hygiene, clean their skin, and keep their living quarters clean and sanitary. They must also take precautions when handling food and water to prevent contamination. By following these practices, astronauts can significantly reduce their risk of developing infections and illnesses while in space.

Maintaining Mental Health and Well-being

Astronauts who are stationed in space for extended periods of time face numerous challenges that can negatively impact their mental health and well-being. Prolonged exposure to zero gravity, isolation from family and friends, and confinement within a small space can lead to feelings of stress, anxiety, and depression. Personal hygiene plays a crucial role in maintaining the mental health and well-being of astronauts in space.

Poor personal hygiene can lead to a decline in physical appearance, which can negatively impact an astronaut’s self-esteem and confidence. In addition, the lack of access to clean water and limited supplies of soap and shampoo can lead to skin irritation and hygiene-related illnesses. Maintaining personal hygiene in space is essential for preventing these issues and promoting mental health and well-being.

To maintain mental health and well-being, astronauts in space must follow a strict personal hygiene routine. This includes washing their hair with shampoo and conditioner, brushing their teeth with toothpaste, and using wet wipes to clean their skin. Astronauts must also maintain their beards and trim their nails to prevent hygiene-related issues.

In addition to maintaining physical cleanliness, astronauts must also maintain a clean and organized living space. This includes keeping their quarters clean and tidy, washing their clothes regularly, and disposing of waste in a responsible manner. A clean and organized living space can help to reduce stress and promote a sense of calm and well-being.

In conclusion, maintaining personal hygiene is essential for the mental health and well-being of astronauts in space. A strict personal hygiene routine, including washing hair, brushing teeth, and using wet wipes, must be followed to prevent hygiene-related issues and promote mental health and well-being. A clean and organized living space is also important for reducing stress and promoting a sense of calm and well-being.

FAQs

1. Do astronauts wash in space?

Yes, astronauts do wash in space. Personal hygiene is important for maintaining health and well-being, even in the vacuum of space. Astronauts use specialized equipment and techniques to maintain their personal hygiene while in space.

2. How do astronauts wash their hands in space?

Astronauts use a device called the “Water Recovery System” to wash their hands in space. This system recycles urine and sweat into clean water, which is then used for hand washing and other personal hygiene tasks. The water is sterilized using ultraviolet light to ensure it is safe to use.

3. Do astronauts shower in space?

No, astronauts do not shower in space. Due to the lack of gravity, water would float away and be lost, making it impossible to shower in the traditional sense. Instead, astronauts use wet wipes and other cleaning solutions to maintain their personal hygiene.

4. How do astronauts maintain their oral hygiene in space?

Astronauts use toothbrushes and toothpaste in space to maintain their oral hygiene. The toothbrush is designed to work in a weightless environment, and the toothpaste is specially formulated to work without water. Astronauts also use mouthwash to freshen their breath and prevent the growth of bacteria.

5. Do astronauts use deodorant in space?

Yes, astronauts use deodorant in space to prevent body odor. The deodorant is applied to the skin to prevent the growth of bacteria and to mask body odor. It is important to maintain personal hygiene in space to prevent the growth of bacteria and to maintain a clean and healthy environment.

Chris Hadfield demonstrates how astronauts wash their hands in zero-g

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