Earth, asteroid

NASA raised eyebrows earlier this month when it announced that astronomers were tracking a massive asteroid that poses a small, but troubling, chance of striking Earth in the coming years. The space ...
Earth’s atmosphere is constantly changing and evolving ... The change will occur rapidly on a geological scale, leaving most oxygen-dependent organisms little time to adapt.
Scientists challenge the idea that intelligent life is rare. They argue that evolution follows planetary changes, not random ...
NASA announced Wednesday that the odds of the up to 300-foot-wide asteroid hitting Earth dropped from record highs. See where ...