Researchers think a planet-wide groundwater system may have once existed on Mars, and SpaceX launched the very first commercial crew capsule which docked on the International Space Station!
Hosted by: Hank Green
SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at https://www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: