Farming and testing the edible conch.
Extracting salt from ocean water.
Exploring a living coral reef.
A lizard adapts to its desert island.
Diving with an underwater computer.
Restoring an ancient monument.
Making cheese from sheep's milk.
Exploring an ancient civilization.
Ash covers ancient cities.
Searching for Atlantis.
Rock-climbing and rope-tugging.
Racing high-tech bikes.
Inside a giant bubble.
A profile of the kangaroo.
Capturing and tagging the koala.
Australia's national birds.
Eating moths; studying beetles.
Tracking platypuses and echidnas.
Flying hospitals; ambulances.
The Laura Dean Dancers discuss balance.
Why people need sleep.
Pregnancy and infant care.
Twins hold a holiday party.
Antarctica's Dry Valley.
Fishing for jellyfish.
Driving on ice; the South Pole.
Traveling from New York to Antarctica.
Ladybugs, softballs, blimps.
A butterfly "aviary."
An engineless plane.
Bats navigate in the dark.
Making a tropical jungle for a zoo.
Students make neighborhood maps.
Boats break arctic ice.
Rounding up horses.
Kenyan baboons frolic.
Newborn bear cubs.
Dense fur insulates the sea otter.
A study of rats and bats.
Students design balsa structures.
Building part of a cathedral.
People build a Masai house in Kenya.
An elephant helps raise a tent.
The science of fingerprinting.
Injured birds; owl pellets.
Stone tools in Kenya.
A prehistoric mine; mummies.
A computer reads special characters.
Preparing for an earthquake.
Homemade paper and kites.
Repairing landslide damage.
The diet of prehistoric humans.
A pig's digestive track.
The special roles of proteins.
The diets of koalas and fleas.
Examining animals' teeth.
Villagers erect a huge obelisk.
Collisions and stops.
The skeleton aids movement.
A large boat is raised in a lock.
The cast explores a shipwreck.
A marine biologist discovers a crustacean.
A man crosses the Atlantic on a raft.
The possibility of humans living underwater.
Counteracting water resistance.
Computers convert messages.
A reporter sends his story.
Animals respond to signals.
A talking parrot.
A French tourist visits a diner.
Miguel tries a human-powered aircraft.
A makeup artist transforms Miguel.
An artist heats and hammers glass.
Kathy visits the Kohler factory in Wisconsin.
Restoration of the Statue of Liberty.
Mass production farming.
Mary watches automatic milking machines.
A "brangus" and its parents.
Where rubber comes from.
A sheepshearing class.
Prisms help save lives.
Dogs and colorblindness.
Dissecting a bovine eye.
Why leaves change color in autumn.
Astronomer Jack Harvey discusses the characteristics of sun and sunlight.
Tame orangutans return to the wild.
Monkeys and elephants aid man.
Men plant and harvest rice.
Tin ore on a Malaysian hillside.
Making sneakers in Malaysia.
Electricity in living beings.
Converting solar energy.
Using magnets to see inside the body.
Measuring electrical activity.
Solving problems with scale models.
How bats survive.
Life in a tropical rain forest.
Using maps for orienteering.
An ostrich's speed.
A vulture census.
Panning for gold.
Searching for life.
Astronaut Sally Ride.
Food for a weightless environment.
Trying on a space suit.
Riding in an astronaut's training jet.
Converting water to electricity.
Living in a flood zone.
How cactuses survive.
Protein-molecule shape determines function.
A violin's shape determines sound quality.
Bicycle design affects wind resistance.
Designing a bridge.
Animating a human form by computer.
A robot has touch sensors.
Infants have a heightened sense of touch.
Producing various sounds.
A rescue by sharp-eyed pigeons.
Human and animal senses.
Excavating 80-million-year-old dinosaur fossils.
Surviving a volcanic eruption.
A trained monkey aids a quadriplegic.
DNA, the genetic code.
Flying in an ultralight plane.
A paper airplane.
Inflating a parade balloon.
A flying lesson.
Testing baseball helmets.
Cyclists and pole-vaulters.
Increasing skating speed.
Computers aid an athlete.