Earth’s Underwater Topography & The Recent Space Walk

The video discusses the exploration of Earth's ocean floor, revealing that 80% was uncharted. It explains the use of radar altimetry to map the ocean surface, leading to discoveries of undersea volcanoes and tectonic insights. The video also covers the preparation and execution of a spacewalk by astronauts, highlighting the challenges and procedures involved.

What precautions do astronauts take to avoid decompression sickness during a spacewalk?

Describe the process astronauts undergo before conducting a spacewalk.