The news that a female shark at an Italian aquarium gave birth without having mated with a male first was widely reported. But how rare is a "virgin birth" in sharks? Scientists at the Cala Gonone ...

Scientists have confirmed the second-ever case of a "virgin birth" in a shark, indicating once again that female sharks can reproduce without mating and raising the possibility that many female sharks ...

This shark gets its name from an unusual behaviour it displays when threatened by a predator. When threatened, the swell shark swallows vast amounts of seawater, which causes its belly to swell and ...