Go deeper, together.

• Octopus

  the octopus

  An octopus is one of the strangest and cleverest animals in the sea: three hearts, blue blood, no bones at all, and skin that can change color in a heartbeat.

• Jupiter

  the planet Jupiter

  Earth is a ball of rock wrapped in a thin coat of air.

• Sand

  where sand comes from

  A handful of beach is a handful of tiny journeys.

• Floating Ships

  why giant ships float

  A ship can be as heavy as a mountain and still ride on top of the sea, as though the water had been waiting to hold it up.

• Tides

  how the Moon moves the sea

  Twice a day, the ocean breathes in and out, pulled by a moon it has never touched.

• Artemis II

  the journey to the Moon

  Four astronauts loop around the moon and look back at everything anyone has ever loved.

• Monarch Butterflies

  the monarch's great migration

  No single monarch flies the whole round trip; the journey is a relay passed between generations.

• Volcanoes

  how volcanoes build the Earth

  Volcanoes are the Earth's slow, quiet breath: warmth from deep inside, rising patiently, making new land.

• Whale Songs

  how whales sing across the sea

  In the deep, humpback whales sing songs that travel farther than any voice on land.

• Moon Phases

  why the Moon changes shape

  The moon never changes shape; the light on it does.

• Bees

  how bees find their way home

  A honeybee visits a thousand flowers and still finds the one door of her hive.

• Dolphins

  how dolphins see with sound

  Dolphins name themselves with whistles and sleep with half a brain at a time.

• Shooting Stars

  what a shooting star really is

  A shooting star is a grain of ancient dust, ending a journey of millions of years in one bright second over your house.

• Rainbows

  where a rainbow's colors come from

  White light carries every color everywhere it goes; rain just lets them show.

• Feelings

  where our feelings live

  Feelings are real events in the body: weather made of chemistry and heartbeat.

• Sharks

  why sharks are calmer than their reputation

  Sharks are older than trees and calmer than their reputation.

• Steam Train

  how a steam train turns fire into motion

  A steam train is a kettle with wheels and a heartbeat.

• Axolotls

  how axolotls heal and stay young

  The axolotl is a salamander that never grows up and can regrow almost anything it loses.

• The Chunnel

  how a train runs under the sea

  Under the water between England and France runs a tunnel where trains hum through the chalk.

• Bioluminescence

  how living things make their own light

  In the deep sea and on warm beaches, some living things carry their own light.

• Sixteen Sunrises

  a day aboard the space station

  The expanded guide to the Sixteen Sunrises episode, a floating evening aboard the space station, where morning comes sixteen times a day.

• Black Holes

  what a black hole really is

  The expanded guide to the Black Holes episode, the quietest, deepest places in space, visited from a very safe distance.

• The Water Cycle

  the endless journey of a water droplet

  The expanded guide to the Water Cycle episode, following one droplet as it travels between sea, sky, and land, over and over.

• Smell

  how smell is wired to memory

  The expanded guide to the Smell episode, the sense wired straight into memory and feeling.

• Caves

  how water carves and decorates caves

  The expanded guide to the Caves episode, the patient rooms that water carves one drop at a time.

• Hibernation

  how animals slow down to survive winter

  The expanded guide to the Hibernation episode, a lesson from the world's best resters.

• Touch

  how touch works and why it calms us

  The expanded guide to the Touch episode, the first sense we ever have, covering us head to toe.

• Aurora

  what makes the northern lights glow

  The expanded guide to the Aurora episode, the slow curtains of light the sky wears near the poles.

• Clouds

  what clouds are made of and how they float

  The expanded guide to the Clouds episode, the rivers of water that haven't landed yet.

• Dinosaur Fossils

  how fossils form and reveal deep time

  The expanded guide to the Dinosaur Fossils episode, the bones that became stone and remember.

• Earth Day

  the quiet miracles of our planet

  The expanded guide to the Earth Day episode, a slow, grateful lap around the only planet with pillows.

• Garbage Trucks

  how hydraulics give machines their strength

  The expanded guide to the Garbage Trucks episode, the strong, slow machine that cleans the street before you wake.

• Seeds

  how a seed waits and then grows

  The expanded guide to the Seeds episode, the packed suitcase that waits patiently in the dark.

• Saturn

  what Saturn's rings are really made of

  The expanded guide to the Saturn episode, the gentle giant whose smooth rings are billions of separate pieces.

• Hearing

  how sound reaches and moves your ears

  The expanded guide to the Hearing episode, following a whisper from a mouth to a tiny drum and into the mind.

• Mariana Trench

  the deepest, stillest place on Earth

  The expanded guide to the Mariana Trench episode, a gentle, safe descent to the deepest place on Earth.

• The Falling Leaves

  why leaves change color and fall

  The expanded guide to the Falling Leaves episode, the tree letting go, on purpose, one leaf at a time.

• Crystals

  how crystals grow in calm, orderly patterns

  The expanded guide to the Crystals episode, the perfect patterns atoms build when nothing disturbs them.

• Capybaras

  why the calm capybara is so relaxed

  The expanded guide to the Capybaras episode, the world's largest, and most relaxed, rodent.

• Thunder & Lightning

  what makes lightning flash and thunder rumble

  The expanded guide to the Thunder & Lightning episode, turning the rumble that follows the flash into a comfort.

• Nebula Nurseries

  how stars are born in giant clouds

  The expanded guide to the Nebula Nurseries episode, the vast, cold clouds where stars are slowly born.

• Airplane Turbulence

  why planes bump in the air, and why it's okay

  The expanded guide to the Airplane Turbulence episode, the sky's texture, and why the plane was built expecting it.

• Spiders

  how spiders build with silk

  The expanded guide to the Spiders episode, the small architects who rebuild their bridges and wheels each night.

• Hippos

  how hippos walk along the riverbed

  The expanded guide to the Hippos episode, the heavy animal that walks the river bottom like an astronaut.

• Bats

  how bats fly and hunt in the dark

  The expanded guide to the Bats episode, the gentle night-shift fliers who see the dark with sound.

• Sleep

  what happens in your body when you sleep

  The expanded guide to the Sleep episode, the nightly tide that rises in stages to wash and tidy the day.

• Sight

  how your eyes and brain build what you see

  The expanded guide to the Sight episode, following a beam of light from a lamp to your mind.

• Electricity

  how electricity travels through wires

  The expanded guide to the Electricity episode, the quiet copper highway running through your walls.

• Snowflakes

  why snowflakes have six sides

  The expanded guide to the Snowflakes episode, each flake a six-sided diary of the cloud it fell through.

• Taste

  how taste and smell make flavor

  The expanded guide to the Taste episode, riding a bite of food past the tongue's little languages.

• Winter Solstice

  why winter is cold and the solstice matters

  The expanded guide to the Winter Solstice episode, the longest night, and the hinge where the light turns back.

• Farm Tractors

  how a tractor trades speed for strength

  The expanded guide to the Farm Tractors episode, the machine that does big work slowly, and grows our food.

• Fireflies

  how fireflies make their cold light

  The expanded guide to the Fireflies episode, the meadow's slow lanterns and the light that waited years to shine.

• Fireworks

  what gives fireworks their colors

  The expanded guide to the Fireworks episode, bits of earth ground into powder, lifted into the dark, and returned as color.

• Friendship

  the real science of feeling close to people

  The expanded guide to the Friendship episode, the warm, measurable physics of being near people you love.

• Genes & DNA

  how DNA is the recipe for you

  The expanded guide to the Genes & DNA episode, the curled-up recipe, written in four letters, inside almost every cell.

• Oxygen

  where the oxygen we breathe comes from

  The expanded guide to the Oxygen episode, tracing one breath back to the leaves and the plankton that made it.

• Sea Otters

  how sea otters stay warm and safe at sea

  The expanded guide to the Sea Otters episode, the animals that sleep on the water and hold hands so no one drifts away.

• Sea Turtles

  how sea turtles navigate the whole ocean

  The expanded guide to the Sea Turtles episode, a mother turtle crossing an ocean and finding her way home.

• The Sun

  how the sun holds the solar system together

  The expanded guide to the Sun episode, the warm anchor that holds eight planets without ever touching them.

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