Fossil matter proves that the Earth cooled suddenly after an asteroid impact thought responsible for killing the dinosaurs.
A new hypothesis gives the moon credit for cooling a hot, early Earth to the temperatures necessary for life to evolve.
Earth-viewing satellites captured key details of the Chelyabinsk meteor event in Russia. Continue reading →
One geologist thinks Earth has been banged up a bit more than previously thought -- never allowing the 'Snowball Earth' global ice age to develop.
Asteroid Dust To Fight Climate Change on Earth?