Ars Technica
5 months agoOMG science
What would the late heavy bombardment have done to the Earth's surface?
The asteroid that killed the dinosaurs was 10 km in diameter, while the impactor that formed the Moon may have been the size of Mars.
Scientists at the American Geophysical Union meeting discussed how asteroids shaped Earth, causing melted rock and ancient tsunamis.
Marchi and colleagues used the Moon to estimate the number of asteroids that collided with Earth. [ more ]