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A look at why 25,000 honey bees would swarm a hot dog stand in the middle of Times Square; what would cause a healthy bat to hunker down in the snow; how is this crayfish super species threatening to take over the world.

Nature's Strangest Mysteries: Solved

Times Square Bee Swarm

A look at why crows leave gifts in suburban Seattle; how it's possible a shark can be older than America; and who is making the mysterious crop circles at the bottom of the sea in Japan.

The 500-Year-Old Shark

A look at what causes a pair of giraffes to turn white; why are millions of birds creating crazy patterns; why would the world's fastest land animal give up the hunt.

Hot Cheetah

A look at which animals get the giggles; what would cause the sea lions of San Francisco to mysteriously swim away all at once, manta rays that synchronize swim.

Giggling Rats

A look at why a herd of wild elephants check into the same hotel every year and what is causing giant bubble rings off the coast of Portland, Maine.

Elephants in the Room

A look at how bats avoid bumping into each other at night; why a bottlenose dolphin seeks out the help of a scuba diver; are cicadas expert mathematicians.

Bug Mathematician

A look at how a dung beetle standing on its head can roll a ball in a straight line; if egrets ever regret hanging out next to hungry alligators; and what ghostly creature was caught on camera 3000 feet below the ocean's surface.

Alligator Bodyguards

A look at why a seal throws an octopus at a kayaker; why a moth is drinking from the eye of a bird in the Amazon jungle; what surprising creature has been leaping out of the Irish sea.

Octopus Throwdown!

A look at where to go to find an enchanted underwater forest; some Mexican rattlesnakes have lost their rattle; an Indian elephant.

Rattleless Rattlesnake

A look at what could swallow 50-foot trees in seconds, and what animal has changed the face of Yellowstone.

Unicorn of the Sea

A look at why a leopard let its dinner escape; an ominous dark mass looming over an Icelandic lake; some scorpions glow in the dark.

Scorpion Night Lights

A look at why goats risk life and limb to climb an almost vertical dam wall; a zebra has no stripes; a school of fish swarm a diver.

Stripeless Zebra

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Nature is awe-inspiring, and sometimes peculiar animal behaviors and unexpected events can seem inexplicable, but a team of experts is on hand to work on solving some of these mysteries.

S1 E23 | Giggling Rats