an asteroid about half a kilometer wide.  

Weighing in at a whopping  77.6 million metric tons,  

it’s safe to say Bennu could wreak some pretty serious havoc if it collided with Earth.

But that’s just one reason why we’re probing its composition. 

Bennu may be more than 4.5 billion years old,  

so getting to analyze samples from its surface  could tell us so much

about our early planet, solar system, galaxy, and universe,

stuff like where did Earth’s water originally come from?

Subscribe to Seeker and watch our recent Elements video

all about research into water-rich asteroids for more.