Who needs men? A female shark separated from her long-term mate has developed the ability to have babies on her own.
Alt: Leopard shark makes world-first switch from sexual to asexual reproduction
Caspian tigers, some of the largest cats that ever lived — up to 10 feet long and weighing more than 300 pounds — met a grim end in the middle of the 20th century.
Until the mid-1960s when they were designated as extinct, they ranged from modern-day Turkey through much of Central Asia, including Iran and Iraq, to northwestern China. The reasons for their extermination are many