Earth Might Have Been Purple Back In The Day
Our planet is sometimes called the big blue marble, but there's a hypothesis that suggests if you look way back in time, Earth may have once been bright purple.
The Earth’s Rotation Is Slowing, Thanks To The Moon
We’re hearing a lot about how a research project has shown that Earth days used to be about a half-hour shorter than they are now. Why is our planet rotating more slowly now? It's mostly because of the moon.