First-look at the Dust of Bennu

Carbon accounted for almost five percent of the sample’s total weight, and was present in both organic and mineral form, while the water was locked inside the crystal structure of clay minerals, he said.

Scientists believe the reason Earth has oceans, lakes and rivers is because it was hit with water-carrying asteroids 4 to 4.5 billion years ago, making it a habitable planet.

https://www.sciencealert.com/first-look-at-pristine-asteroid-dust-reveals-abundance-of-water-and-carbon

We have ample evidence now that all water on Earth was brought during the “Late Heavy Bombardment” period (4~4.5 billion years ago). Imagine how many rocks it took to get enough water (estimates anywhere between 20 and 200 million years of asteroid after asteroid slamming into the Earth).

And the only reason life exists on Earth is that there is enough iron and nickel in the Earth’s core to generate a magnetic field to prevent solar radiation from ripping off the atmosphere. Which is likely what happened to Mars.

(Alright, alright, technically electrical currents running through the liquid iron outer core as well as in the crust and ionosphere also contribute to the magnetic field. Go check out this horribly complicated explanation if you like.)

Note that this is the third time to get asteroid dust to examine. JAXA has managed to do this twice now. But Hayabusa-2 only got about 5 grams. The OSIRIS-REx project got about 250 grams (1/2 lb). Lots more = lots more to save for future researchers who will have developed even more sophisticated analysis methods.

Now lets get some PEOPLE on those things and start mining and living in space, already!