Add Yahoo as a preferred source to see more of our stories on Google. Earth’s magnetic field plays a key role in making our planet habitable. The protective bubble over the atmosphere shields the ...

Earth’s history spans 4.5 billion years, and throughout this vast timeline, our planet has been home to creatures so strange they seem ripped from the pages of science fiction. From ancient seas ...

If you go to the beach and dip a bucket in the sea, you might at first think it contains lifeless water. But examine that water under a microscope and you will see your bucket contains a universe of ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Earth’s magnetic ...