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Life

How vaccines work

Show your immune system a wanted poster before the real villain arrives.

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Life

How the dinosaurs died

Drop the asteroid and follow the dust that dimmed the whole planet.

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Life

How bees make honey

Follow one sip of nectar from flower to honeycomb.

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Life

What causes hiccups

Poke the diaphragm and hear the snap that makes the 'hic'.

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Life

How coral reefs form

Meet the tiny animals that build the biggest structures on Earth.

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Life

How dreams work

Follow your brain through a night of sleep cycles.

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Life

How birds migrate

Fly south with the flock and find your way with the Sun and stars.

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Life

How dogs see the world

Switch to dog vision: fewer colours, a better nose for motion.

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Life

How octopuses change colour

Squeeze thousands of tiny colour sacs and vanish against a rock.

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Life

How cats purr

Twitch the voice box 25 times a second and feel the rumble.

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Life

Why flamingos are pink

Feed a grey chick shrimp and algae and watch the pink arrive.

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Life

What causes a heart attack

Follow the blood to the heart muscle and see what blocks the way.

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Life

How fish breathe underwater

Push water over feathery gills and pull the oxygen out.

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Life

Why cells divide

Copy the instructions, pull them apart, and make two cells from one.

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Life

How colour mixing works

Mix paint and mix light, and see why they give opposite answers.

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Life

Why sleep is important

Follow your brain through a night and see what it fixes while you rest.

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Life

How enzymes work

Fit the right molecule into the pocket and snap a reaction a million times faster.

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Life

How humans evolved

Walk the family tree from ancient footprints to us.

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Life

How pollination works

Carry pollen from flower to flower and grow a fruit.

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Life

Why leaves change colour

Switch off the green factory and watch hidden yellows appear.

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Life

How eels reproduce

Follow an eel thousands of kilometres to a secret sea to spawn.

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Life

Why mosquito bites itch

Watch your immune system sound the alarm at a tiny drop of spit.

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Life

What causes diabetes

Run out of insulin keys and watch sugar pile up in the blood.

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Life

What causes asthma

Squeeze and swell the airways and feel how hard breathing gets.

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Life

What causes cavities

Feed sugar to mouth bacteria and watch acid dig into a tooth.

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Life

How antibiotics work

Break a bacterium's wall and leave your own cells alone.

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Life

How bacteria reproduce

Split one cell in two, then four, then a million by lunchtime.

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Life

How cats see

Switch to cat eyes: great in the dark, blurry up close.

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Life

Why we yawn

Catch a yawn, and find out why it's so contagious.

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Life

How cheese is made

Curdle milk, press the curds and let tiny microbes do the rest.

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Life

Why DNA matters

Unzip the instruction book inside every one of your cells.

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Life

How chocolate is made

Follow a cacao bean from a rainforest pod to a chocolate bar.

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Life

Why blood is red

Zoom into a red blood cell and find the iron that grabs oxygen.

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Life

Why we sneeze

Tickle a nose and launch a 100-mile-an-hour achoo (maybe).

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Life

Why homeostasis is important

Keep a body at 37 °C through heatwaves and snowstorms.

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Life

How rabies works

Follow a virus along the nerves and see why vaccines stop it.

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Life

How whales sleep

Rest half a brain at a time without forgetting to breathe.

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Life

Why your stomach growls

Listen in as your gut squeezes air and food along.

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Life

Why farts smell

Meet the gut microbes that make a tiny bit of stinky gas.

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Life

How penguins stay warm

Huddle, fluff your feathers and swap heat in your feet.

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Life

How fireflies light up

Mix a little chemical recipe that glows without getting hot.

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Life

What causes goosebumps

Flex hundreds of tiny muscles you never knew you had.

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Life

Why wolves howl

Send a message across miles of forest with one long note.

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Life

Why bees are important

Count the foods that need a bee's fuzzy visit.

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Life

What causes kidney stones

Watch tiny crystals grow into a pebble, and see how water stops them.

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Life

Why cats sleep so much

Nap like a hunter built for short, fast bursts.

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Life

What causes brain freeze

Chill the roof of your mouth and trick your brain.

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Life

Why viruses aren't considered living

Meet a tiny hijacker that can't copy itself on its own.

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Life

How pearls are made

Watch an oyster wrap a tiny intruder in shiny layers.

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Life

Why hair turns gray

Watch pigment cells slowly run out of colour.

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Life

What causes allergies

Watch your immune system panic over a harmless speck of pollen.

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Life

How horses sleep

Lock your legs and doze standing up.

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Life

How snakes move

Slither without legs using four clever tricks.

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Life

How starfish regrow their arms

Lose an arm, grow it back.

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Life

Where yeast comes from

Meet the tiny fungus that makes bread rise.

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Life

How plant and animal cells are different

Compare two cells: one with walls and solar panels, one without.

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Life

Why beavers build dams

Stack sticks and mud to make a moat around your home.

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Life

Why dogs wag their tails

Read what a wag really means, left or right.

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Life

Where fruit flies come from

Find out how a tiny fly finds your banana in minutes.

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Life

Why veins look blue

Discover why red blood looks blue through your skin.

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Life

What makes a fruit a fruit

Is a tomato a fruit? Follow the seeds to find out.

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Life

How jellyfish reproduce

Meet an animal that can start life as a tiny stalk.

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Life

Why sleep paralysis happens

Find out why your brain can wake up before your body.

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Life

How photosynthesis works

Shrink down into a leaf and watch sunlight turn into sugar.

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Life

Where mosquitoes go in winter

Find out how mosquitoes survive the cold until spring.

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Life

How fish sleep

See how fish rest with their eyes wide open.

Soon

Life

Mitosis vs meiosis: how cells divide

Split one cell into two twins, or four one-of-a-kind cells.