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That bug is no insect This springtail looks a lot like an insect; in fact, scientists long thought insects evolved from the group of hexapods it belongs to. But comparative genomics, using mitochondrial DNA, now shows that life's family tree has a whole new branch. Nature, it seems, found two different ways to evolve six legs. A model old mouse Mice can teach us a lot about life. Keep it simple, stay out of trouble -- and maintain your genome. Researchers who study mouse models of accelerated aging have learned that cataracts, hearing loss, and other traits of old age result when the body's ability to repair its DNA is disrupted. Squeezing the glass sponge |
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