Season 5

Video thumbnail: Deep Look Whack! Jab! Crack! It's a Blackback Land Crab Smackdown

Deep Look

Whack! Jab! Crack! It's a Blackback Land Crab Smackdown

These Caribbean crabs will tear each other limb from limb to get the best burrow.

Whack! Jab! Crack! It's a Blackback Land Crab Smackdown

Video thumbnail: Deep Look Want a Whole New Body? Ask This Flatworm How

Deep Look

Want a Whole New Body? Ask This Flatworm How

Planarians are tiny googly-eyed flatworms that can regrow their entire body.

Want a Whole New Body? Ask This Flatworm How

Video thumbnail: Deep Look A Sand Dollar's Breakfast is Totally Metal

Deep Look

A Sand Dollar's Breakfast is Totally Metal

Sand dollars look way different in their lives beneath the waves.

A Sand Dollar's Breakfast is Totally Metal

Video thumbnail: Deep Look The House Centipede is Fast, Furious, and Just So Extra

Deep Look

The House Centipede is Fast, Furious, and Just So Extra

House centipedes are masterful predators with a knack for fancy footwork.

The House Centipede is Fast, Furious, and Just So Extra

Video thumbnail: Deep Look How Kittens Go From Clueless to Cute

Deep Look

How Kittens Go From Clueless to Cute

Born deaf and blind, kittens need constant warmth and milk to survive.

How Kittens Go From Clueless to Cute

Video thumbnail: Deep Look This Adorable Sea Slug is a Sneaky Little Thief

Deep Look

This Adorable Sea Slug is a Sneaky Little Thief

Nudibranchs may look cute and defenseless ... but watch out. These sea slugs are thieves.

This Adorable Sea Slug is a Sneaky Little Thief

Video thumbnail: Deep Look Watch This Bee Build Her Bee-jeweled Nest

Deep Look

Watch This Bee Build Her Bee-jeweled Nest

A female blue orchard bee is a multitasking master. Her beautiful nests help food grow.

Watch This Bee Build Her Bee-jeweled Nest

Video thumbnail: Deep Look How Elephants Listen ... With Their Feet

Deep Look

How Elephants Listen ... With Their Feet

African elephants may have huge ears, but they also listen with their feet.

How Elephants Listen ... With Their Feet

Video thumbnail: Deep Look What Do Earwigs Do With Those Pincers Anyway?

Deep Look

What Do Earwigs Do With Those Pincers Anyway?

Earwigs have some imposing pincers on their rear, and they're not afraid to use them.

What Do Earwigs Do With Those Pincers Anyway?

Video thumbnail: Deep Look You'd Never Guess What an Acorn Woodpecker Eats

Deep Look

You'd Never Guess What an Acorn Woodpecker Eats

The lengths they have to go to to stock up for the winter *will* surprise you.

You'd Never Guess What an Acorn Woodpecker Eats

Video thumbnail: Deep Look Watch These Cunning Snails Stab and Swallow Fish Whole

Deep Look

Watch These Cunning Snails Stab and Swallow Fish Whole

Cone Snails have an arsenal of tools and weapons under their pretty shells.

Watch These Cunning Snails Stab and Swallow Fish Whole

Video thumbnail: Deep Look You've Heard of a Murder of Crows. How About a Crow Funeral?

Deep Look

You've Heard of a Murder of Crows. How About a Crow Funeral?

Crow funerals aren't the solemn events that we hold for our dead. What's really going on?

You've Heard of a Murder of Crows. How About a Crow Funeral?

Video thumbnail: Deep Look Why Do Tumbleweeds Tumble?

Deep Look

Why Do Tumbleweeds Tumble?

To reproduce, vibrant tumbleweeds need to turn into rolling brown skeletons.

Why Do Tumbleweeds Tumble?

Video thumbnail: Deep Look Upside-Down Catfish Doesn't Care What You Think

Deep Look

Upside-Down Catfish Doesn't Care What You Think

This catfish looks confused, but swimming belly-up helps it camouflage and breathe better.

Upside-Down Catfish Doesn't Care What You Think

Video thumbnail: Deep Look Take Two Leeches and Call Me in the Morning

Deep Look

Take Two Leeches and Call Me in the Morning

Once used for questionable treatments, leeches now help doctors to reattach body parts.

Take Two Leeches and Call Me in the Morning

Video thumbnail: Deep Look How Ticks Dig In With a Mouth Full of Hooks

Deep Look

How Ticks Dig In With a Mouth Full of Hooks

A tick uses a mouth of hooks to cling to you. But there *is* a way to pull it out.

How Ticks Dig In With a Mouth Full of Hooks

Video thumbnail: Deep Look So... Sometimes Fireflies Eat Other Fireflies

Deep Look

So... Sometimes Fireflies Eat Other Fireflies

Most firefly flashes are pure romance. One copycat uses them to lure others to their doom.

So... Sometimes Fireflies Eat Other Fireflies

Video thumbnail: Deep Look For Pacific Mole Crabs It's Dig or Die

Deep Look

For Pacific Mole Crabs It's Dig or Die

Some very special physics help Pacific mole crabs dig with astonishing speed.

For Pacific Mole Crabs It's Dig or Die

Video thumbnail: Deep Look Why the Male Black Widow is a Real Home Wrecker

Deep Look

Why the Male Black Widow is a Real Home Wrecker

The female black widow has a bad reputation, but her male counterpart is a total jerk.

Why the Male Black Widow is a Real Home Wrecker

Support for PBS.org provided by: