The bright flowerlike symmetry of Australia’s northern jeweled orb-web spider lures in hungry prey.
The animals' bodies contained pollutants not found in dolphins before.
Finding suggests "megapredators" may have been more common in Mesozoic Era than previously thought.
Alligator blood inhibits a key toxin in the venom of vipers such as rattlesnakes and copperheads.
Study suggests parts of the animals' backs and legs fused together to form wings.