Where have all the craters gone?
Wednesday, May 28, 2014 - 01:31
in Astronomy & Space
Impact craters reveal one of the most spectacular geologic process known to human beings. During the past 3.5 billion years, it is estimated that more than 80 bodies, larger than the dinosaur-killing asteroid that struck the Yucatan Peninsula 66 million years ago, have bombarded Earth. However, tectonic processes, weathering, and burial quickly obscure or destroy craters. If Earth weren't so dynamic, its surface would be heavily cratered like the Moon or Mercury.