Your kids might live on Mars. Here's how they'll survive | Stephen Petranek

Going to Mars: The Future of Human Colonization

Why Should We Colonize Mars?

• The speaker introduces the idea of colonizing Mars, emphasizing that thousands will participate in this endeavor soon.

• Acknowledges the vulnerability of Earth to cosmic threats, such as asteroids, and argues for the necessity of reaching beyond our planet for survival.

• Highlights human exploration as an intrinsic trait, noting historical migrations and advancements driven by exploration.

• Discusses the potential inspiration a Mars landing could provide, similar to the excitement generated by JFK's moon landing announcement.

• Suggests that surviving on Mars may lead humanity to appreciate Earth more deeply.

Understanding Mars

• Provides a comparison between Mars and Earth, stating that while smaller than Earth, its surface area is comparable due to Earth's water coverage.

• Describes Martian conditions: thin atmosphere (96% carbon dioxide), extreme cold (average -81 degrees), and longer seasons compared to Earth.

• Notes that despite its harsh environment, Mars is currently the most habitable location in our solar system outside of Earth.

Challenges of Reaching Mars

• Emphasizes the vast distance to Mars—250 million miles—compared to 250,000 miles to the Moon; travel time estimated at eight months under optimal conditions.

• Discusses launch timing challenges due to alignment requirements between Earth and Mars every two years.

• Reviews past missions' success rates; only about one-third have been successful out of 44 attempts by various countries.

Current Space Travel Capabilities

• Reflecting on historical rockets like Saturn V which were capable but are no longer available; current rockets are insufficient for a manned mission to Mars.

• Questions when humans will land on Mars; some predict 2050 or NASA's goal of 2040. The speaker believes we can land by 2027.

Elon Musk's Role in Colonization

• Introduces Elon Musk as a key figure in achieving this goal with his ambitious timeline for landing humans on Mars by 2025 or 2027.

• Compares Musk’s achievements over the last decade in electric vehicles and space travel as indicators of his capability to reach this goal.

Can We Actually Live on Mars?

The Basics of Survival on Mars

• The question of living on Mars is raised, with NASA aiming for potential missions by 2040 while private entities may reach it sooner.

• Essential needs for survival include food, water, shelter, clothing, and oxygen; the latter being a critical addition compared to Earth.

Water Availability on Mars

• Despite its dry appearance, Martian soil contains up to 60% water; orbiters have confirmed the presence of water ice in craters.

• Evidence from the Phoenix Lander in 2008 shows ice just below the surface; evaporation was observed over time.

• Significant underground water exists along with glaciers; melting polar ice could cover much of Mars under 30 feet of water.

• A low-tech dehumidifier developed at the University of Washington can extract necessary water from the humid Martian atmosphere.

Oxygen Production Solutions

• NASA has developed a machine called Moxie that converts Martian CO2 (96% of its atmosphere) into breathable oxygen.

• Moxie's design allows it to produce enough oxygen for one person indefinitely and is scalable by a factor of 100.

Food Production Challenges

• Hydroponics will be used for food production but can only supply about 15–20% until surface water becomes available.

• Most food will initially be dried and shipped from Earth due to limited local agricultural capabilities.

Shelter Considerations

• Initial shelters may consist of inflatable buildings or landers but are insufficient against solar and cosmic radiation during nighttime.

• Utilizing Martian soil to create bricks mixed with polymer plastic offers a solution for building thick-walled structures or using natural caves/lava tubes.

Clothing Adaptations for Mars

• Unique space suits designed by MIT's Dava Newman will provide necessary pressure, warmth, and radiation protection due to Mars' thin atmosphere.

Terraforming: Making Mars Habitable

• Terraforming involves reengineering Mars to resemble Earth more closely; existing technology can facilitate this process.

• Heating frozen carbon dioxide at both poles could thicken the atmosphere through sublimation, leveraging CO2 as a greenhouse gas.

Future Prospects

• A large solar sail could be deployed to focus sunlight on polar regions, accelerating atmospheric warming within approximately 20 years.

Exploring the Future of Mars Colonization

The Benefits of a Thicker Atmosphere

• A thicker atmosphere on Mars would provide increased protection from radiation and contribute to warming the planet, enabling running water essential for crop growth.

• With sufficient atmospheric pressure (around five pounds), humans could potentially live without space suits, making Mars more habitable.

• The long-term goal is to create a breathable atmosphere, which may take up to 1,000 years; however, human adaptability and intelligence are highlighted as key factors in overcoming this challenge.

Human Evolution and Adaptation

• Advances in biology may allow humans to control their genetics and evolution, leading to potential differences between Earth and Martian inhabitants.

• Life on Mars will likely mirror Earth with various industries emerging: restaurants, hotels, bars, software companies, and even entertainment like reality TV shows.

The Impact of Colonizing Mars

• The colonization of Mars is anticipated to be a transformative event that inspires future generations; children today may choose to live there.

• Historical context is provided by comparing the Moon landing's impact on human perception of possibilities with what might happen when a colony is established on Mars.