The bright flowerlike symmetry of Australia’s northern jeweled orb-web spider lures in hungry prey.
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.
Traditional microscopes make it look like sperm tails undulate symmetrically -- but that's an optical illusion.
Narwhal vocalizations are not well understood, but Inuit whale hunters helped scientists get close enough to listen.