Everybody's favorite science cartoonist Beatrice the Biologist aka Katie McKissick has some ideas for diversifying school mascots.
Archaea are some of the most abundant and least understood, organisms on the planet. These single-celled creatures weren't even properly discovered until the 1970s, and big questions about them remain unanswered, such as whether other organisms ever eat them.
Eons ago, two single-celled organisms, a bacterium and an archaeon, combined to form the first complex cell. This symbiosis gave birth to all multi-cellular organisms, but new evidence suggests this wasn't about cooperation. That bacterium was actually a parasite.
The Last Universal Common Ancestor is the great-grandparent of everything that has ever lived on Earth. Scientists had long assumed it was a crude, simple thing, more a chemical mishmash than anything else. But our earliest ancestor holds some surprises.