Rainforests are home to half of the world's plant and animal species. Here are the five largest rainforests in the world.
Here's how the term "horsepower" got its start and why we still use it today.
From the debut of new launch vehicles to missions to the moon, Mars, asteroids and much more, a lot of exciting missions are expected to launch or arrive at their destination in 2022.
Scientists have just created the world's lightest form of magnesium — a never-before-seen isotope with just six neutrons in its atomic nuclei.