The short answer is 4.54 billion years old. But how do we even know that? And what happened during all those billions of years before humans evolved?
Category: Geology
There’s a mud puddle that moves
What. Even. This mud puddle moves 20 feet per year. Once it jumped 60 feet in one day. Learn its story.
Could you actually live on Mars?
Here are a few things to bring with you to the red planet and some information on living there.