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November 9, 2025, 01:30 PM - 4 min read
In a new study, researchers quantified the energy cost of pumping blood for a typical adult giraffe and compared it to what it would be in an imaginary animal with short legs but a longer neck to reach the same treetop height.
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November 7, 2025, 03:40 PM - 6 min read
Sex differences in brain gene activity appear early in the development of the foetus, long before puberty or even the formation of testes and ovaries.
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September 22, 2025, 02:10 PM - 7 min read
Volcanic eruptions are excellent timekeepers because they happen very quickly, geologically speaking. As hot magma erupts, it cools and solidifies into volcanic ash particles and pumice rocks.
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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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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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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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