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Circadian rhythm pt. 2: Beyond human

Bears, skunks and snakes are just a few examples of hibernating animals.

Circadian rhythms keep our bodies on schedule. But what about the rest of the animal and plant world?

The tick-tock of our circadian clock

Wanna learn about the suprachiasmatic nucleus? It's in our brains and it's the conductor of our circadian rhythm.

The near 24-hour-cycle that keeps us on track is conducted by the suprachiasmatic nucleus. It’s a tiny part of our brains, but it’s super, super important.

Our 100th episode! What’s the big deal?

In this milestone of an episode, we ask why people seem to love the number 100 so much. We also learn some amazing tricks involving the number 100 and fan favorite Gungador goes from Most Epic Fighting Battle Realm to a much more challenging setting: high school.

Meet Sandy, the left-handed mutant snail

Alex Bairstow took this photo of Sandy, an unusual snail from California. (Courtesy of the Natural History Museum of Los Angeles County)

For humans, being left-handed or right-handed can definitely affect the way we experience life. Usually, that mismatch is just a minor nuisance — but sometimes, sidedness can change the future of an entire species, as is the case for Sandy.

Dolphins vs. Octopuses: Showdown in the sea!

Which are cooler: Dolphins or octopuses?

We’re asking you to decide which animal reigns supreme. Is it the eight-armed, three hearted, shape-shifting octopus? Or the speed-swimming, echolocating, super-jumping dolphin?

Dogs: What’s the secret of their sense of smell? (Encore)

Freedom, a beagle trained to sniff out bedbugs, on July 26, 2010 in the Queens borough of New York. (STAN HONDA/AFP/Getty Images)

If you’ve ever seen a dog, you know they like to sniff — the ground, people, each other’s butts. They like to smell just about everything. But why? We’re digging into the science of smell and how dogs are able to decode things we can’t even begin to imagine. Plus a brand new Moment of Um: How do bees make honey?

Mary Shelley and the science of Frankenstein

A statue of Frankenstein's monster in Geneva.( FABRICE COFFRINI/AFP/Getty Images)

As we celebrate the 200th anniversary of the novel’s publication, we look at how Mary Shelley was inspired by science and how the lessons of the book still resonate with the scientific world today.

Super-size-asaurus: How did dinosaurs get so big?

A Brachiosaurus dinosaur herd pass through a dry desert area in the Jurassic Period of North America.

Ancient dinosaurs were some of the biggest creatures to ever stomp the Earth. But how and why did they get so giant?