Anhingas are large, dark waterbirds with a long, thin neck, a long, thin, pointed bill, a long tail and silver patches on their wings and are found in southeastern swamps.

At first the parents feed the chicks by dripping partially digested fish down their throats. As the chicks grow older, they shove their heads into their parents’ beaks to reach their food.

Antechinus: The tiny marsupials where males have sex until they die — then females eat their corpses

Name: Antechinus (Antechinus)

Where it lives: Australia

What it eats: Insects, spiders, centipedes and sometimes frogs and small reptiles

Why it's awesome: Antechinuses are little marsupials about the size of gerbils with a bizarre reproductive system: the males have sex until they die from organ failure.

There are 15 species of Antechinus all with the same deadly mating system. Their breeding season is a frenzied period lasting just two to three weeks. During this time, males give up sleep to have as much sex as possible, going for up to 14 hours at a time in the hope of passing on their genes. Once the breeding season ends, all the males drop dead. Read More »

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Traces of cocaine discovered in mummified brain tissue reveal that Europeans were chewing coca leaves — possibly for medical or recreational purposes — in the 17th century, two centuries before the earliest known documented use of the New World plant in the Old World, a new study finds.

More than 500 species of cichlids have evolved in Africa's Lake Victoria over the past 15,000 years. A vibrant blue and purple fish with a flower or brain-like protrusion on its forehead

(Image credit: JethuynhCan via Getty Images)