Season 5

    Video thumbnail: Deep Look How Your Dog's Nose Knows So Much

    Deep Look

    How Your Dog's Nose Knows So Much

    Dogs have a great sense of smell, but what makes their noses so powerful?

    How Your Dog's Nose Knows So Much

    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 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 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?