Articles sur Evolution

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A member of a rare group of 410-million-year-old jawless fishes from Australia meets a mate. along the shoreline (artist’s impression). Nobumichi Tamura

Ancient fish evolved in shallow seas – the very places humans threaten today

New research shows shallow, near-land seas similar to Bass Strait were critical in the early days of fish evolution. These are the waters we need to protect now to ensure ongoing biodiversity.
Some Harlequin ladybugs, Harmonia axyridis, have black elytra with two large red spots. Others have two additional red spots backwards, or are decorated with a dozen small red spots. Conversely, there are ladybugs with red elytra, decorated with 20 black spots. All these ladybugs belong to the same species. B. Prud’homme, J. Yamaguchi

In red and black, the genetics of ladybug spots

Where do the pretty colours of the harlequin ladybug come from? A single gene draws the colour patterns of this familiar insect.
A three-banded clownfish (Amphiprion ocellaris) navigates the anemones of the Andaman Coral Reef, India. Ritiks/Wikipedia

Why does Nemo the clownfish have three white stripes? The riddle solved at last

Our children all know the little clownfish Nemo, star of the Pixar film. But why does he have three stripes, rather than one or two? Developmental and evolutionary biology are revealing the answer.
Dinosaurs had some bad luck, but sooner or later extinction comes for all of us. rawpixel/Unsplash.com

What makes some species more likely to go extinct?

Death is inevitable for individuals and also for species. With help from the fossil record, paleontologists are piecing together what might make one creature more vulnerable than another.

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