What If Earth Was No Longer Our Home?

Astrobiologist Answers Mars Questions

Starship - The Holy Grail of Rocketry

How Hard Is It to Go Back? — Inside NASA’s Race to the Moon | Full Documentary | NOVA | PBS

The ocean is massive

While exploring the #deepsea around #WakeAtoll during the NA181 expedition, our remotely operated vehicles helped the Corps of Exploration spot multiple fossilized #sharkteeth. Found at depths between 4,587 meters (15,049 feet) and 5,016 meters (16,457 feet), these teeth are covered in a dark coating similar to the nearby seafloor rocks. This is called a ferromanganese crust - a natural, black mineral deposit that precipitates very slowly from seawater and coats objects found on the deep ocean f

Swimming Beside Massive Ships: Underwater Scale Revealed