Michael Shara
Michael Shara
choice choices deciding earth happens hardest hits iron leave
The hardest choices we had to make was deciding what to leave out. What happens when an icy meteor hits the Earth is different than when an iron meteor hits the Earth. But we had to leave out some things.
critical hard missions nasa science
It's critical that NASA think very hard about these unmanned science missions continuing.
asteroid cheap hit
It wouldn't be cheap to do. But having an asteroid hit us wouldn't be cheap either.
dear near subject
Its a subject that's near and dear to my heart.
consistent science written
There can't be anything wrong, factually or visually, with anything about this presentation. It has to be consistent with what is being written in the science journals.