Sharks are, by any definition, incredibly badass. They’re the only animals around that can claim to have chowed down on honest-to-goodness dinosaurs; they induce what is genuinely known to biologists ...

These cartilaginous fish (order Chimaeriformes) possess distinctive features including a single gill opening covered by a flap, smooth skin without scales, and large, specialized tooth plates instead ...

THE articulate brachiopod Gwynia capsula (Fig. 1), which is only about 1 mm in diameter, was described by Jeffreys in 1859 and recorded during the last half of the nineteenth century from several ...