Overview: Nat Geo joins the search for an unidentified "highway beast" in Minnesota. Villagers in Southern Africa are stumped by round patches of sand that stretch over a thousand miles of landscape.
Overview: A popular surfing beach in Florida is known as the shark bite capital of the world, in England a mystery feline predator stalks the woods.
Overview: Nat Geo WILD investigates nature's most bizarre, baffling and downright mysterious cases.
Overview: What has caused hundreds of freshwater crocodiles to suddenly die in the Australian wilderness? Plus, a sterile mule in Morocco gives birth to a miraculous foal.
Overview: A mystery predator is turning Kruger National Park into a slaughterhouse; a bizarre, unidentified creature is caught on film in North Carolina.
Overview: Can reindeer really fly? And what is causing marine turtles to wash up dead and emaciated on the Great Barrier Reef?
Overview: How can rocks in Death Valley, CA move by themselves, leaving trails that stretch for hundreds of feet?
Overview: Does Vermont's Lake Champlain have its very own Loch Ness Monster? In Norway, a blue spiral light appears in the pitch black sky.
Overview: Can an extinct predator come back from the dead to terrorize a town? Why do millions of sardines swim to their deaths in a small harbour?
Overview: Five thousand blackbirds fall out of the sky one night in Arkansas. In the Scottish Highlands a sticky goo found on the ground has experts baffled.