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Calcium is everywhere in your body, not just your bones and teeth. In fact, this mineral is crucial to countless biological processes, from regulating your hormones to aiding muscle function. And when you don't have enough of it, the results can be disastrous. More »
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The atoms of proteins move around in incredibly complicated ways, but modeling how all those moving parts fit together is vital to understanding biology. Now, thanks to a supercomputer, you can see every step of the process right here. More »
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While it is popularly believed that evolution occurs through mutations in DNA, that's simply not true. Now scientists have more evidence that evolution functions even among proteins that have no DNA. More »
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Every time your cells divide, the "telomeres," or caps on the ends of your chromosomes, get a little shorter. Elderly creatures begin to suffer diseases of old age partly because their telomeres have become so short, and cellular division becomes difficult and error-prone. That's why telomeres are the subject of intensive study: If we could figure out the mechanism that keeps our telomeres from shortening, it's possible we could prolong our lives. Now a group of California researchers have discovered that a protein called Est3 (pictured) is partly responsible for keeping telomeres long. Manipulating that protein could bring us one step closer to healthy cell longevity. More »
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