Building Blocks of Life Discovered on Distant Asteroid | NOVA | PBS

Samples returned from the asteroid Bennu contained organic molecules, the same category of chemistry that makes up life on Earth, and this short unpacks what scientists think that means. It is a modest discovery treated with appropriate caution about what it does and does not prove about life beyond our planet.

Why it's free: Free on NOVA PBS's own channel; GBH produces NOVA for PBS.