How Big is the Universe?

How do cheetahs get their super speed? We talk to a cheetah scientist to find out why a spotted cat is the fastest animal on Earth. Cheetahs are literally built for speed! Anne Hilborn spent months scoping out cheetahs on the hunt in the grasslands of the Serengeti. We’ll discove ...  Show more

This is a rebroadcast of one of our favorite episodes from last season, and one that is particularly timely for the summer! What if you found out that there was a tiny, nearly invisible type of plastic pollution that’s found nearly everywhere… but you’d never heard of it! That’s ...  Show more

In the early 1900s, Henrietta Leavitt made one of the most important discoveries in the history of astronomy: a yardstick to measure distances to faraway stars. Using this tool, scientists eventually transformed our understanding of the universe. They realized space was expanding ...  Show more

In the early 1900s, Henrietta Leavitt made one of the most important discoveries in the history of astronomy: a yardstick to measure distances to faraway stars. Using this tool, scientists eventually transformed our understanding of the universe. They realized space was expanding ...  Show more

The solar system is big, the distances between stars bigger, and the distance to the center of the galaxy in which we live is even bigger than that. But all of that is tiny compared to the distance to the edge of the known universe! Just how big is that? The Math Dude breaks it a ...  Show more

What are Galaxies? How big are they? And where are we in this vast universe? Learn about galaxies in this new Knowledge Plus episode from Plus Podcast Network.Find more information on our website https://englishpluspodcast.com/knowledge-plus-what-are-galaxies/Become our patron on ...  Show more