A long, long time ago, marsupials the size of small trucks, 2-meter-tall "thunder birds" and 5-meter-long venomous lizards roamed Australia. These animals—and more—were Australia's megafauna.

Earth once hosted many massive creatures called megafauna; they are technically defined as animals with mature body weights that exceed 44 kilograms (97 pounds). Megaherbivores, on the other hand, are ...

Today’s land animals are a bunch of runts compared with creatures from the not-too-distant past. Beasts as big as elephants, gorillas and bears were once much more common around the world. Then, ...

New evidence involving the ancient poop of some of the huge and astonishing creatures that once roamed Australia indicates the primary cause of their extinction around 45,000 years ago was likely a ...

Former NFL back Chris Johnson was diagnosed with ALS at 39 and now speaks through an eye-controlled device. What early symptoms look like. Conor Benn faces the scale on Friday before his Las Vegas ...

Fossil remains of the extinct Marsupial Lion Thylacoleo at Victoria Fossil Cave in Naracoorte Caves. Complex ecological network models have uncovered a previously unrecognised process contributing to ...

If things had turned out differently in past millennia, modern-day animal lovers wouldn't have to fly to Kenya to go on safari. North America was once overrun with tourism-worthy animals: Aside from ...