Up Next
Back to Show
It's Okay to Be Smart
Why Are There 7 Days In a Week? Explained
Season 8
Episode 22
Why does everyone use a 7 day week, and where did it come from? Where do the names of the days come from? And who can we blame for Mondays? Here’s the true story of one of the oldest human customs still in use today. It gets a little weird.
Sign up now for inspiring and thought-provoking media delivered straight to your inbox.
Support Provided By
17:58
How the CIA used Cold War technology to study and combat climate change
13:58
The secret physics at the core of every syllable, starting with the first words we speak.
9:56
The glow from faster-than-light particles gives us a unique way to explore the universe.
10:40
A mysterious and highly impactful phenomenon that scientists are still learning about.
9:10
Countershading is everywhere, and it may be nature’s most successful form of camouflage.
12:59
Global warming means more air conditioning…causing more warming 🤦. Could new chemistry he
14:49
How does iridescence work? From rainbow bubbles to beautiful birds, bugs, and gemstones.
11:53
Under house arrest in Egypt, one mathematician transformed how we examine the world.
8:32
Animals as simple as bees and as complex as you and me and have fun too!
13:10
We explore why embarrassment has lasted through evolution and its function.
13:49
We are in search of the blackest black things on Earth and why.
14:24
Knowing exactly what a “second” is is more complicated than you might think!