Category: What were humans like in the past?

A mysterious cold gas shooting out of the center of the Milky Way galaxy has left scientists puzzled.

Maybe you didn't have a stellar childhood, but stars definitely did. (Get it?) Learn about a major research project that investigated one mechanism involved in how stars get bigger.

For the past few decades, scientists have been looking at planets outside of our solar system to see if they could host life. Now, scientists have discovered another factor for habitability: radiation from the planet’s central star.

All life on Earth survives because of the sun. Plants use a process called photosynthesis to transfer energy from the Sun’s rays into the sugars that build their stems and leaves. Animals either eat the plants directly, or eat other animals that have eaten plants. Countless other organisms, like bacteria, algae, and…