Wanna see Mars' close approach? Just look up!

What's better than a mystery sound? How about 11 mystery sounds! We have mystery sounds from listeners all over the world to share with you, plus two from scientists. And our co-host Juniper will try to stump Molly with a mystery sound of her own!Click here to read a transcript o ...  Show more

Every spring we set our clocks one hour forward. Every fall we move them one hour back. It’s a strange ritual when you think about it, so why do we do it? Join Molly and co-host Ava as they explore the seasons and why days are shorter in the winter and longer in the summer. We’ll ...  Show more

How big is the universe? And how do we know? It's a question that puzzled astronomers for centuries. They had no way to measure distance in space - until Henrietta Leavitt showed them how. Henrietta Leavitt was a "computer" in the 19th century, before there were computers, and sh ...  Show more

We spend a lot of time on top of our planet, but we don’t spend much time inside it. So it makes sense you might wonder what our planet is made of, deep deep down. Is it more rocks? Is it lava? Is it a gooey caramel center? And what about the other planets, like Mars and Jupiter? ...  Show more

Mars Gets Ready for Its Close-up Mars has fascinated Earthlings for millennia, ever since we looked skyward and found the red planet. Through telescopes, probes, and robots, scientists have gazed at its red rocks, craters, and canyons—and the latest rover, Perseverance, is poised ...  Show more

When you look up at the night sky, what do you see? A few stars, or a satellite, maybe even one of the seven other planets in our solar system? But how many planets are there in all of outer space? We asked astronomer Mark Popinchalk to help us find the answer!Got a question taki ...  Show more