'Lost shark' possibly extinct, dolphin threatened - Red List

A shark only just formally discovered might already be extinct - a fate no shark has yet suffered in the human era - while an Amazon river dolphin has become endangered, a Red List of species in trouble showed on Thursday.

More than a quarter of the 128,918 animal, plant and fungi species assessed by the International Union for Conservation of Nature (IUCN) in its update are now threatened with extinction...