Science news articles about 'comet bombardment'

... we see on the ground and what is expected from the galactic record.” The periods of comet bombardment also coincide with mass extinctions, such as that of the dinosaurs 65 million years ago. Our ...

... these chevrons, unless you have some unimaginable process at work," Bourgeois said. Asteroids and comets bombarded Earth in the distant past, at times with devastating consequences, such as the ...