Picture all of Earth’s oceans, which cover about 70% of the planet and are mostly made of hydrogen. Now multiply that by nine. That may be the amount of hydrogen in Earth’s core, possibly making it ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. “It’s alive! IT ...

We usually think of auroras as beautiful lights in the night sky. I see them as visible traces of a connection between the ...

The study of Earth science isn’t just for students who are interested in how our planet works. It’s also for those who are passionate about addressing urgent global challenges such as climate change, ...

Not satisfied with just knowing the what, but want to know why? We invite you to explore deeply into the various processes that are continuously changing our planet and what that can mean to modern ...

Add Popular Science (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results.

(CNN) — Picture all of Earth’s oceans, which cover about 70% of the planet and are mostly made of hydrogen. Now multiply that by nine. That may be the amount of hydrogen in Earth’s core, possibly ...