which only made their debut about 100 million years ago – some 400 million years after the advent of color vision. Since then, however, animals' color signals have struck an evolutionary chord.

Predators need to recognize these colors as dangerous, even if the animal displaying them can’t see in color, the study explains. Sexual displays, which emerged around 100 million years ago ...

Now, the fossilized footprints of a small microraptorian may signal the animal's use of flap-running, a form of aerial movement that involved the flapping of feathered arms. (Credit: Mark ...

Scientists have discovered the oldest known animal with saber teeth: a predator that lived 270 million years ago. This animal, from before the age of the dinosaurs, was a dog-like creature that was ...

Conspicuous colors tend to be signals, often helping animals woo mates or warn predators. Yet the origins of these attention-grabbing colors are not clear. Did plants start making jazzy fruits and ...