The Titanoboa - In the pantheon of predators, it's one of the greatest discoveries since the T-Rex: a snake 48 feet long, weighing in at 2,500 pounds. Uncovered from a treasure trove of fossils in a Colombian coal mine, this serpent is revealing a lost world of giant creatures. Travel back to the period following the extinction of dinosaurs and encounter this monster predator.
Images: Stingray Sex, Mini-Horses & Other Curiosities of Fossil Lake
From Fossil Lake, which was teeming with life during the early Eocene, about 52 million years ago. Only one frog has ever been found at the formation. The single specimen pictured here measures just 1.6 inches (4 cm) long.
According to some scientists, this 220-million-year-old fossil, from the late Triassic era. offers evidence that dinosaurs were not ancestral to birds. An archosaur called Longisquama insignis, a small reptile roughly the size of a mouse, has ignited scientific controversy due to the six vane-like appendages attached to either side of Longisquama's back. Some researchers believe the appendages were non-avian feathers and that early archosaurs were the ancestors of modern birds.