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These fossilized foraminiferan shells, dating back 35 to 45 million years, were found in Tanzania. They all belong to species that are now extinct. The largest are about half a millimeter in diameter.

The history of the ocean, as told by tiny beautiful fossils

By Tim Vernimmen / Knowable Magazine

illustration of brain and rabbit

It began with a rabbit: Unraveling the mystery of memory

By Tim Vernimmen / Knowable Magazine

"A white-headed capuchin (Cebus capucinus) eating a fruit, sticking its tongue out.More of my pictures of animals:"

Meet the capuchin monkey: Curious, creative and vengeful

By Tim Vernimmen / Knowable Magazine

An earwig with eggs.

The elaborate courtship, devoted parenthood, and occasional cannibalism of earwigs

By Tim Vernimmen / Knowable Magazine

A ribosome in action. As messenger RNA passes through the ribosome (center left), other RNA molecules (bottom left) bring in amino acids that match the instructions in the mRNA. These amino acids are then joined together into a new protein (top right). But might these trusty little protein-making workhorses come in more than one flavor?

When ribosomes go rogue

By Tim Vernimmen / Knowable Magazine

An old female rhesus macaque eats alone on the island of Cayo Santiago. As female macaques age, the size of their social network shrinks.

It’s not just us: Other animals change their social habits in old age

By Tim Vernimmen / Knowable Magazine

amphibian parents

The tender art of tadpole parenting

By Tim Vernimmen / Knowable Magazine