The ancient Greeks proved over 2,000 years ago that the Earth was round and figured out how big it was by using simple observations of the Sun. But how do people know this today? When you drop ...

We have just entered a very favorable period for observing the so-called "elusive" planet Mercury. From now, until about May 13, you should be able to find it with not much difficulty. But how well do ...

Venus is undoubtedly one of the weirdest planets in the solar system. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Venus, the second planet ...

It’s not unusual for kids to be concerned about the environment; we’ve been drilling common tips about protecting the Earth into their heads since before they could walk. But that doesn't mean parents ...

Do you know a kid who is learning about climate change? We made a comic about how it's changing the planet and how to deal with the big feelings you might have when you hear about it. Climate change ...