This year marks the 55th anniversary of Earth Day! Every year on April 22, people worldwide mobilize to address some of the most urgent threats facing our environment, from climate change to ...

Throughout most of Earth's geological history, its paleoclimate has remained hospitable to life—largely thanks to continental ...

Ah, Earth. We may not think about our planet on a day-to-day basis, but the world we live in is a pretty interesting place. The third rock from the Sun—and to this day, the only one with known ...

The surface of our planet is a true geological theater where a permanent spectacle of movements and transformations takes place. These impressive phenomena result from plate tectonics, a ...

Scientists at MIT and elsewhere have discovered extremely rare remnants of "proto Earth," which formed about 4.5 billion ...

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

There are almost 200 nations on the planet and every one of them has some stunning trivia you need to hear about.Here are ...

While Earth Day, observed annually on April 22, may not be a major holiday that’s widely celebrated outside of classrooms, it’s more than worthy of honoring. After all, without Earth, where would we ...

Select an option below to continue reading this premium story. Already a Honolulu Star-Advertiser subscriber? Log in now to continue reading. The exact sequence of events behind eukaryogenesis is ...

Select an option below to continue reading this premium story. Already a Honolulu Star-Advertiser subscriber? Log in now to continue reading. Another fascinating application of quantum tunneling is in ...