The exceptionally weird Late Cretaceous shark Aquilolamna milarcae.Illustration: Vullo et al., Science (2021) Paleontologists have announced the discovery of an extraordinary fossil shark in Mexico. They describe Aquilolamna milarcae, a Late Cretaceous shark that was wider than it was long, with an oddly slender pair of pectoral fins. This shark, far from a ferocious biter, …