Season 4

Video thumbnail: Deep Look Archerfish Says..."I Spit in Your Face!"

Deep Look

Archerfish Says..."I Spit in Your Face!"

Is this fish smarter than it looks?

Archerfish Says..."I Spit in Your Face!"

Video thumbnail: Deep Look Roly Polies Came From the Sea to Conquer the Earth

Deep Look

Roly Polies Came From the Sea to Conquer the Earth

Whatever you call them, there’s something less creepy about these critters than others.

Roly Polies Came From the Sea to Conquer the Earth

Video thumbnail: Deep Look Why Reindeer and Their Cousins are Total Boneheads

Deep Look

Why Reindeer and Their Cousins are Total Boneheads

What if you had to grow 20 pounds of bone on your forehead each year just to find a mate?

Why Reindeer and Their Cousins are Total Boneheads

Video thumbnail: Deep Look Praying Mantis Love is Waaay Weirder Than You Think

Deep Look

Praying Mantis Love is Waaay Weirder Than You Think

When it comes to hooking up, male mantises have good reason to fear commitment.

Praying Mantis Love is Waaay Weirder Than You Think

Video thumbnail: Deep Look It’s a Goopy Mess When Pines and Beetles Duke it Out

Deep Look

It’s a Goopy Mess When Pines and Beetles Duke it Out

Pine beetles can fell a mighty ponderosa pine, but the forest fights back. Who will win?

It’s a Goopy Mess When Pines and Beetles Duke it Out

Video thumbnail: Deep Look These Whispering, Walking Bats Are Onto Something

Deep Look

These Whispering, Walking Bats Are Onto Something

Bat echolocation is loud, so some bats have hit on a sneakier, scrappier way to hunt.

These Whispering, Walking Bats Are Onto Something

Video thumbnail: Deep Look There's Something Very Fishy About These Trees...

Deep Look

There's Something Very Fishy About These Trees...

When salmon die, a new journey begins – with maggots.

There's Something Very Fishy About These Trees...

Video thumbnail: Deep Look A Baby Dragonfly's Mouth Will Give You Nightmares

Deep Look

A Baby Dragonfly's Mouth Will Give You Nightmares

Baby dragonflies grow up in a larva-eat-larva world. Up close, they look like monsters.

A Baby Dragonfly's Mouth Will Give You Nightmares

Video thumbnail: Deep Look Daddy Longlegs Risk Life and Especially Limb to Survive

Deep Look

Daddy Longlegs Risk Life and Especially Limb to Survive

When predators attack, daddy longlegs deliberately release their limbs to escape.

Daddy Longlegs Risk Life and Especially Limb to Survive

Video thumbnail: Deep Look This Is Why Water Striders Make Terrible Lifeguards

Deep Look

This Is Why Water Striders Make Terrible Lifeguards

They may look serene as they glide across the surface of a stream, but don't be fooled.

This Is Why Water Striders Make Terrible Lifeguards

Video thumbnail: Deep Look These Fish Are All About Sex on the Beach

Deep Look

These Fish Are All About Sex on the Beach

During the highest tides California grunion stampede out of the ocean to mate on the beach

These Fish Are All About Sex on the Beach

Video thumbnail: Deep Look Behind the Scenes With Deep Look: The Diva Decorator Crabs

Deep Look

Behind the Scenes With Deep Look: The Diva Decorator Crabs

How long does it take to film a decorator crab putting on its seaweed hat?

Behind the Scenes With Deep Look: The Diva Decorator Crabs

Video thumbnail: Deep Look How Do Pelicans Survive Their Death-Defying Dives?

Deep Look

How Do Pelicans Survive Their Death-Defying Dives?

Brown pelicans hit the water at breakneck speed when they catch fish.

How Do Pelicans Survive Their Death-Defying Dives?

Video thumbnail: Deep Look Identical Snowflakes? Scientist Ruins Winter For Everyone

Deep Look

Identical Snowflakes? Scientist Ruins Winter For Everyone

We've all heard that each and every snowflake is unique.

Identical Snowflakes? Scientist Ruins Winter For Everyone

Video thumbnail: Deep Look These Fighting Fruit Flies Are Superheroes of Brain Science

Deep Look

These Fighting Fruit Flies Are Superheroes of Brain Science

Thanks to The Great Courses Plus for sponsoring this episode of Deep Look.

These Fighting Fruit Flies Are Superheroes of Brain Science

Video thumbnail: Deep Look Everything You Never Wanted to Know About Snail Sex

Deep Look

Everything You Never Wanted to Know About Snail Sex

Besides being hermaphrodites — all snails have both boy and girl parts.

Everything You Never Wanted to Know About Snail Sex

Video thumbnail: Deep Look Decorator Crabs Make High Fashion at Low Tide

Deep Look

Decorator Crabs Make High Fashion at Low Tide

When you live by the seashore, one day you're in, the next day you're lunch.

Decorator Crabs Make High Fashion at Low Tide

Video thumbnail: Deep Look Why Does Your Cat's Tongue Feel Like Sandpaper?

Deep Look

Why Does Your Cat's Tongue Feel Like Sandpaper?

It's not vanity. For cats, staying clean is a matter of life and death.

Why Does Your Cat's Tongue Feel Like Sandpaper?

Video thumbnail: Deep Look If Your Hands Could Smell, You’d Be an Octopus

Deep Look

If Your Hands Could Smell, You’d Be an Octopus

Those hundreds of powerful suckers on octopus arms do more than just stick.

If Your Hands Could Smell, You’d Be an Octopus

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