More than 500 species of bacteria thrive in our mouths. But one type seems to play by its own rules. The cells of most bacteria reproduce by splitting in two. Corynebacterium…

It’s a pleasant summer morning. Across a field, a line of poplar trees sways in the breeze. Insects buzz and flit among the branches. Everything seems calm and peaceful. But…

Tyrannosaurus rex towered over many other dinosaurs. But the biggest of the king of the dinos may have been even heftier than fossils hint. Only around 80 fossil T. rex…

When you think of ancient pyramids, your mind probably goes to Egypt. Ancient Egyptians built these monuments as tombs for their kings, starting around 2700 B.C. Perhaps the most famous…

Monotreme (noun, “MON-oh-treem”) Monotremes are a unique group of mammals that lay eggs. Only five species of monotreme exist today. All live in either Australia or New Guinea. The platypus…

Some tadpoles seem to have a unique way to keep their watery cribs clean: They don’t poop for weeks! These baby Eiffinger’s tree frogs live in Taiwan and on the…

Nearly 2,000 years ago, a huge volcano in southern Italy suddenly, explosively woke up. Ash and gas from the eruption killed at least 1,500 people in the cities of Pompeii…

Some 640,000 years ago, a massive eruption rocked the land that, today, is Yellowstone National Park. The eruption spewed ash across much of the area that’s now the United States.…