Discover which is the most abundant element in the universe, along with list of other most common elements found on Earth.

I live near a few volcanoes. One of them – Mount St. Helens – is bubbling with molten material that will probably gush out as lava someday. I asked my friend Johannes Hämmerli about lava. He’s an ...

Blue oceans, green forests, a cozy blanket of oxygen. Our planet is a super comfy home. It’s hard to imagine there was ever a time it didn’t exist. I asked my friend Julie Ménard how Earth formed. She ...

Helium is the second most abundant element in the universe, but on earth it's in short supply. And Iran's retaliatory strikes on helium-rich Qatar have made it even more scarce. Helium is the second ...