Nature's Strangest Mysteries: Solved

Experts reveal why a raccoon would scale a 25-story skyscraper, why a mother duck would have a super-sized flock of 76 ducklings and what would motivate a bird to feed a school of fish.

Experts examine what would dare take on the ocean's deadliest predator, why a spider would light up like a Christmas tree and why a wild animal would start delivering unwanted newspapers like a paperboy.

Experts reveal why a humpback whale would hold a diver hostage, how a colony of 1.5 million animals could hide from the world in plain sight and how a surprising stash of acorns could disrupt a whole town.

Experts reveal why a skunk would do a handstand, why 5,000 birds fell from the sky in Arkansas and what would make a frog flash like a lighthouse.

Experts unscramble the mysteries of fish predicting earthquakes and why eggs are egg-shaped.

Experts examine if zombie spiders could be real, what's hovering over Denver and why a pod of beluga whales adopted a unicorn of the sea.

Experts reveal how a bird could sing without using its voice and how an octopus could simply disappear from his aquarium tank. These could be two of nature's greatest illusionists.

Experts reveal what would make an animal vanish into thin air, what could cause the sea to take on an eerie glow and what event would bring killer whales together in huge numbers.

Experts reveal what animals are breaking into thousands of cars every year, how ants form a 10-foot bridge using only their bodies and why the fish crossed the road.

Experts reveal if crows have funerals, how spiders covered a town in webs overnight and why a lake in South America is the lightning capital of the world.

Experts reveal if it is possible a snake could exist totally undetected, what has brought a big cat fight to ear-piercing decibels and why a lone dolphin is getting muddy.

Experts reveal how a moose got stuck in an apple tree, why a crow is snowboarding on a jam jar lid and if Yellowstone's super volcano is about to erupt.

Experts reveal what would cause a ferocious tiger shark to cuddle up with a diver, why pigs are swimming in the Caribbean and what the mysterious blobs that have washed up by the thousands on the shore of Oregon are.

Experts reveal why some spiders disco dance, what mysterious creature is preying on Europe's sheep and what in the world could cause a whole town to be engulfed by bubbling foam.

Experts reveal why goats would risk life and limb to climb an almost vertical dam wall, what happens when a zebra has no stripes and why a school of fish would swarm a diver.

Experts reveal why a leopard would let its dinner escape, what the ominous dark mass looming over an Icelandic lake is and why scorpions glow in the dark.

Experts reveal what the point of narwhal tusks is, what could swallow 50-foot trees in seconds and what animal has changed the face of Yellowstone.

Experts reveal where to go to find an enchanted underwater forest, why some Mexican rattlesnakes have lost their rattle and why an Indian elephant looks like it's smoking cigarettes.

Experts reveal why a seal threw an octopus at a kayaker, why a moth is drinking from the eye of a bird in the Amazon jungle and what surprising creature has been leaping out of the Irish Sea.

Experts reveal how a dung beetle can roll a ball in a straight line while standing on its head, whether egrets regret hanging out next to hungry alligators and what ghostly creature was caught on camera 3,000-feet under the ocean.

Experts reveal how bats avoid bumping into each other at night, why a bottlenose dolphin sought out the help of a scuba diver and if cicadas are expert mathematicians.

Experts reveal why a herd of wild elephants check into the same hotel every year, what is causing giant bubble rings off the coast of Portland, Maine and what animals are locked and loaded at the bottom of the ocean.

Experts reveal which animals get the giggles, what caused the sea lions of San Francisco to mysteriously swim away all at once and whether manta rays have taken up synchronized swimming.

Experts reveal what could cause a pair of giraffes to turn white, why millions of birds are creating crazy patterns and why the world's fastest land animal would give up the hunt.

Experts reveal why crows are leaving 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.