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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Disruptions in the interaction between nuclear and mitochondrial DNA can lead to deficiencies in the mitochondrial energy-generating process, affecting fitness.
A psychiatric drug in the water can cause perch to be less social, more voracious hunters.
A species of sea slug discards its penis after mating, then grows another the next day, a tactic that may have evolved to avoid passing on the sperm of competitors.
Man’s best friend is better able to grasp their human owners’ points of view than previously realized.
A small insect-eating animal is the common ancestor of whales, elephants, dogs, and humans.
Protein aggregates in the brains of some people with dementia or motor neuron disease have a surprising origin.
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.
Using evolutionary animal behavior theories, researchers find daytime stock traders’ strategies are maladapted.
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