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The trap-jaw is the fastest in the world -- and it independently evolved several times in ants

Trap-jaw ants are infamous for having one of the strongest bites among all animals, but we didn’t really understand how they evolved from more traditional jaws. A new study looking at their evolutionary history found that the distinctive mechanism behind trap-jaws has evolved independently several times across the globe. Unlike normal gripping jaws, which open and close through the contraction of muscles, trap-jaws use a complex mechanism to latch themselves open and clamp down when needed. This mechanism allows the jaws to store energy much like a spring, and this can be released to produce a lot of force quickly.

Covid-19: Genes inherited from Neanderthals can reduce risk of severe illness - in some

Luis Diaz Devesa There are a number of lucky individuals who have a group of genes that reduces their risk of developing severe Covid-19 disease, caused by the SARS-CoV-2 virus. These genes, or DNA variants, are inherited from the Neanderthals (our closest extinct human relatives), and are said to lower the risk of becoming seriously ill with Covid-19 by around 20%, according to a new study. The study was conducted by researchers at the Okinawa Institute of Science and Technology Graduate University (OIST) in Japan, and the Max Planck Institute for Evolutionary Biology in Germany, and was published in the journal

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