Explore how spacecraft hold breathable air in a vacuum using pressure vessels, seals, and life support systems.

A clear look at the scientific arguments for and against alien life, from habitable zones to the Drake Equation.

Learn how astronomers test mysterious signals from space, separate noise from intelligence, and confirm whether a possible alien transmission is real.

Emergency drills help astronauts respond quickly to fires, leaks, loss of pressure, and other spacecraft hazards.

Learn what space radiation is, where it comes from, how it affects astronauts and spacecraft, and how missions reduce the risk.

Learn how fire behaves in microgravity, why flames look different in orbit, and what spacecraft do to prevent and extinguish them.

Explore why space survival is hard, from vacuum and radiation to isolation, microgravity, and life-support engineering.

Discover why pressure is essential for human survival in space, how vacuum affects the body, and how spacecraft protect astronauts.

Learn how astronauts manage nausea, infections, and emergencies in microgravity, plus the medical tools and protocols that keep crews safe.