Season 2

Be Smart

Why Do We Laugh?

S2 Ep50 | 6m 3s

Several jokes were harmed in the making of this video

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Why Are Cicadas So Good At Math?

S2 Ep49 | 5m 32s

Do periodical cicadas "know" how to calculate prime numbers?

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Your Salad Is Trying To Kill You

S2 Ep48 | 6m 3s

The dose makes the poison…

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How Does A Canyon Become Grand?

S2 Ep47 | 4m 3s

And a very Grand Canyon it is…

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Why Are The Bees Dying?

S2 Ep46 | 4m 1s

If bees go, will they take us with them?

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Which Came First - Flowers or Bees?

S2 Ep45 | 5m 19s

Stop and smell the flowers… and watch this video

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The Surprising Places We Waste Energy

S2 Ep44 | 3m 26s

We use a LOT of energy, but we waste a lot too.

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Does The Moon Really Orbit The Earth?

S2 Ep43 | 2m 44s

What holds the moon up? Moonbeams!

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What's The Loudest Possible Sound?

S2 Ep42 | 3m 49s

It's definitely higher than "11"

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Could We Clone Ourselves?

S2 Ep41 | 5m 31s

Just be yourself! Or be your other self. Whichever.

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Is Ultron Inevitable?

S2 Ep40 | 7m 42s

Will artificial intelligence ever surpass human intelligence?

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What Color is the Universe?

S2 Ep39 | 2m 51s

Hint: It's not black

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Your #ScienceWoman Heroes

S2 Ep38 | 4m 46s

We teamed up with Amy Poehler's Smart Girls to ask you who your #sciencewoman heroes are.

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How Many Heartbeats Do We Get?

S2 Ep37 | 4m 27s

Science really gets my heart going…

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5 Weird Involuntary Behaviors Explained!

S2 Ep36 | 4m 50s

Yawns, hiccups, twitchy eyes (and more) explained!

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Why People Don't Believe In Climate Science

S2 Ep35 | 6m 50s

Scientists overwhelmingly agree that our climate is changing.

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Building Curiosity

S2 Ep34 | 2m 6s

An ode to curiosity… with LEGO

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The Sixth Extinction

S2 Ep33 | 8m 26s

This time, we're the asteroid

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Why Are Some People Left-Handed?

S2 Ep32 | 5m 1s

The science of their sinister ways…

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Why I'm Scared of Spiders

S2 Ep31 | 3m 6s

The science of… OH GOD IS THAT A SPIDER?!

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Why Does The Earth Have Layers?

S2 Ep30 | 4m 31s

…or why we live on an onion made of magma

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Why Do Clouds Stay Up?

S2 Ep29 | 5m 13s

There's nothing wrong with having your head in the clouds

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A Slice of Pizza Science!

S2 Ep28 | 3m 32s

How does math keep a folded slice from drooping?

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The Physics of Space Battles

S2 Ep27 | 5m 13s

How scientifically accurate is your favorite sci-fi space battle?