Europa has a vast, saltwater ocean beneath its icy shell, with more than twice the amount of water in all of Earth’s oceans ...

Although oxygen is now the most abundant element in our oceans and our atmosphere, comprising about 88.8 percent and 23.1 percent of the mass of the two, respectively, this wasn’t always the case. In ...

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

As negotiations over slowing climate change unfold at the COP27 climate summit in Egypt, a group of scientists and conservationists is pushing for recognition of the Angolan Highlands as a vital ...

The Earth has been bathed in this flux of solar energy for billions of years. All life on this planet is powered by the sun. The fossil fuels we now primarily use are essentially the deposited remains ...

In a peer-reviewed analysis, scientists quantify amino acids before and after our “last universal common ancestor.” The last universal common ancestor (LUCA) is the single life form that branched into ...

Knowing your "why" isn't just nice—it's essential to living a happy, fulfilling life. Here, experts offer steps to finding your purpose in life. What is the purpose of life? There are as many answers ...