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 she made an incredible discovery that would help change the way people thought abo ... Show More
Yesterday
Mailbag: How Did Mars Form?
In this mailbag episode, Marshall and Lindsay tackle two great questions from listeners about rainbows and how Mars formed. Also, you'll get to hear about Marshall's trip to the Cambridge Science Carnival in Cambridge, MA, and as always your listener reviews. Help Tumble on our q ... Show More
20m 40s
Oct 16
Fact or Fiction: Sloths (Featuring the Story Pirates)
Explore the wild world of kids’ imaginations with Story Pirates! Story Pirates is a podcast that takes stories written by kids and brings them to life as hilarious sketches and songs, performed by a crew of comedians, actors, and musicians. Listen to Story Pirates here: https://w ... Show More
35m 55s