The Earth is really, really old. Over 4 1/2 billion years old, in fact. How do we begin to comprehend a number that large? It helps to put it on a more fathomable scale. Watch to see where Earth's ...
What if the moon and planets were closer to Earth? That's what Nick Holmes decided to find out. Holmes, AKA "yeti dynamics" on YouTube, animated these 3D models. He is an amateur astronomer and is ...
A simple animation created by planetary scientist James O'Donoghue puts the whole thing in perspective. "People often talk about how we are standing on a ball (Earth) which rotates at great speed ...