Why Earth is the only planet with plate tectonics
Here in our Solar System, of all the known planets, only Earth — not Mercury, not Venus, and not Mars — possesses plate tectonics.
Discovery finds the Earth’s core is constantly changing the length our day
The length of our day changes slightly over a six-year period. This recent discovery has perplexed scientists for about a decade.
1.7 billion years ago, Earth had a natural nuclear reactor
Seventeen natural sites possessing ancient nuclear reactions have now been found: evidence of Earth's first nuclear reactor.