Aggressive ocean predator, the bull shark, ventures up rivers to find prey. But lurking is a deadly killer - the Nile crocodile. Reports of clashes between the two are many but marine researchers are determined to find out the truth.
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It's a bittersweet farewell as the team releases the rehabilitated baby rhinos into the wild.
The Bullit Center living building mimics a tree; nature-based inventions change buildings.
Flying planes in tight formation to mimic the energy-efficient flight patterns of migrating birds.
Glass inspired by spiders; a unique farm delivers produce at a lower cost than traditional farms.
A robot on wheels patterned after sea urchins; shark skin provides the inspiration for a motorcycle.
How biomimicry is being used for space exploration; aircraft material inspired by sea sponges.
Exoplanets outside the solar system; discoveries of other worlds.
The case for space exploration: a change in perspective; economic benefits.
Emily Calandrelli explores some prominent disasters in the space race.
Amusement park rides can be like space travel.
People of all ages visit Space Camp to find out what it is like to train to be an astronaut.
Fearsome predators: owls; leopards.
Examining some of the animal kingdom's fastest sprinters and cleverest species.
The anteater; the walrus.
The beluga whale; the owl.
The pufferfish; the hummingbird.
The female cubs meet their future handler Tim at their new home, Bush Gardens in Tampa Bay, Florida.
The cubs will soon leave to become ambassadors; Sebastian behaves badly and starts biting.
The bat-eared fox pups struggle for survival; Cheetah Outreach founder Annie stops by to observe.
Emily takes the cubs on their first trip from the cub's house, a walk in the vineyards.
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