New answers tagged comets
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How much mass did the Late Heavy Bombardment add to Mars?
Alessandro Morbidelli has kindly consulted me on this topic. He said:
"The late veneer on Mars is approximately equivalent to that of the Earth, from the abundance of highly siderophile elements ...
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5
votes
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Extinction Level Event (Asteroid Impact Hypothesis) Likelihood Equation
Knowing that there are X asteroids that could threaten is not in itself useful. What you want to get is a event rate, the probability of something happening per year.
One oversimplified way is to ...
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