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Searched Tag: evolution
Sharks freeze when upside down, and there’s no good reason why

Sharks freeze when upside down, and there’s no good reason why

June 25, 2025, 04:15 PM - 5 min read

For some animals, this freeze response – called “tonic immobility” – can be a lifesaver. Possums famously “play dead” to avoid predators. So do rabbits, lizards, snakes, and even some insects.

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2-million-year-old pitted teeth point at human evolution

2-million-year-old pitted teeth point at human evolution

June 12, 2025, 05:00 PM - 7 min read

For people who try to figure out how humans evolved and how all our ancestors and relatives were related to each other, teeth are very important. And having a new marker to look out for on fossil teeth could give us a new tool to help fit together our family tree.

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The faces of living and extinct theropod dinosaurs. Left: Riya Bidaye; right: Indian Roller model (NHMUK S1987) from TEMPO bird project.

It’s mathematics: Bird and dinosaur beaks are proof!

April 22, 2025, 02:49 PM - 6 min read

By studying beaks in light of this mathematical rule, we can understand how the faces of birds and other dinosaurs evolved over 200 million years. We can also find out why, in rare instances, these rules can be broken.

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