Spacewalk: Exploring the Depths of Space

The video explains spacewalks, also known as EVAs, which are activities astronauts perform outside spacecraft. It covers the history of spacewalks, including Alexey Leonov's first spacewalk and Anatoly Solovyev's record. Training for spacewalks involves swimming in the Neutral Buoyancy Lab and using virtual reality. Astronauts prepare by wearing spacesuits and breathing pure oxygen to prevent the bends. During spacewalks, astronauts use airlocks, safety tethers, and jet thrusters for safety and mobility.

Explain the importance of breathing pure oxygen before a spacewalk.

What safety measures are taken to prevent astronauts from floating away during a spacewalk?