Earth is our home planet, and it's the only place in the universe where we know for certain that life exists. Earth formed over 4.5 billion years ago from a swirling cloud of gas and dust squished ...

MADDIE MOATE: It’s estimated that the Earth is home to about three trillion trees, and around 9 million different types of animals - including about 8 billion people. It’s the only planet in ...

Did you miss the last planetary alignment in January? Well, you're in luck. The next one is on Feb. 28 and is viewable from ...