More than 350 elephants in Botswana have mysteriously died since May, in a phenomenon that some scientists have dubbed a "conservation disaster," and one that has evaded explanation.
A striking red-and-white pattern on a newly-described spider's back resembles the grin worn by iconic Batman villain, the Joker.
When an adult male gorilla in a South African zoo developed breathing problems, wildlife specialists diagnosed the ailment with CT scans.
Photographs of a shark bearing strange, circular scars could be evidence of a rare giant squid encounter, researchers say.
Great white sharks are fierce hunters. But as juveniles, their diets involve way more bottom-feeding than hunting large prey.
Rattlesnakes are threatened in British Columbia in Canada, and many populations are declining at alarming rates.
After snake eels are swallowed by bigger fish, they can burst out of their predators' stomachs ... to freedom? Not exactly.
Teeny-tiny sea creatures secrete snotty blobs from cells on their heads to build their oversized mucus dwellings.
A pregnant wild elephant in Kerala, India, died on May 27, possibly due to an explosion in her mouth after she ate a fruit stuffed with firecrackers.
Fossil brachiopods from China were crusted with parasites, which may have hijacked their hosts' feeding structures in order to steal their dinner.