Cryogenian Period

A Day on Earth Used to Only Be 19 Hours

A new study has revealed that for 1 billions years, a day on Earth lasted for about 19 hours.

1 year ago

800 Million Years Ago, it Was Raining Asteroids on the Earth and Moon

Natural processes here on Earth continually re-shape the planet's surface. Craters from ancient asteroid strikes are erased in a short…

4 years ago