The small organ evolved too many times for it to be an accident, but it’s still unclear what it does.
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A study suggests that some mouse models do not accurately mimic human molecular mechanisms of inflammatory response, but other mouse strains may fare better.
A small insect-eating animal is the common ancestor of whales, elephants, dogs, and humans.
One of the most advanced tuberculosis vaccines has failed to protect infants from getting the disease in a clinical trial, but it may be effective in adults.
Fluorescent calcium sensors in transgenic mice give a real-time readout of neuronal activity.
A handful of species have learned how to survive in freezing climates. To do so, the animals must counteract the damaging effects of ice crystal formation, or keep from freezing altogether. Here are a few ways they do it.
With dogged persistence and an unwillingness to entertain defeat, Bruce Beutler discovered a receptor that powers the innate immune response to infections—and earned his share of a Nobel Prize.
Animals and plants come in a dizzying array of colors. Current research is cracking into the remarkable structures behind nature's artistic display.
Some of these insidious viruses expertly subvert the host immune system, allowing their unhindered proliferation.
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