A look at what could 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.
A look at what animals are breaking into thousands of cars every year, how ants form a ten-foot bridge using only their bodies, and why did the fish cross the road.
A look at if crows have funerals, how spiders could cover a town in webs overnight, and why a lake in South America is the lightning capital of the world.
Is it possible that a snake could exist totally undetected? What has brought this big cat fight to ear piercing decibels? Why is this lone dolphin getting muddy?
A look at what would cause a ferocious tiger shark to cuddle up with a diver and why pigs are swimming in the Caribbean; and what mysterious blobs have washed up by the thousands on the shores of Oregon.
Why would a leopard let its dinner escape? What is the ominous dark mass looming over an Icelandic lake? And how come scorpions glow in the dark? Nature's Strangest Mysteries has the answers.
Narwhals are the unicorns of the sea, but what is the point of those tusks? What could swallow 50-feet trees in seconds? What animal has changed the face of Yellowstone?
Where would you go to find an enchanted underwater forest? How come some Mexican rattlesnakes have lost their rattle? And why does an Indian elephant look like its smoking cigarettes?
A look at why a seal throw 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.
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.
A look at how bats avoid bumping into each other at night; why a bottle-nose dolphin seeks out the help of a scuba diver; are cicadas expert mathematicians.
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.
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.
Experts examine footage of crows leaving gifts in Seattle. Plus, could a shark really be older than America? And, what is making crop circles in the sea?
Why would 25, 000 honey bees swarm a hot dog stand in the middle of Times Square? Just what would cause a healthy bat to hunker down in the snow? And how is this crayfish super species threatening to take over the world?
