Earth Might Have Been Purple Back In The Day (Cool Weird Awesome 318)
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 (Cool Weird Awesome 257)
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.