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Controlling genes with light

Although human cells have an estimated 20,000 genes, only a fraction of those are turned on at any given time, depending on the cell's needs—which can change by the minute or hour. To find out what those genes are doing, ...

dateJul 23, 2013 in Biotechnology
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Fragments falling onto the Sun

( —Stars form as gravity coalesces the gas and dust in an interstellar cloud until the material develops clumps dense enough to become stars. Even after a star begins to burn its nuclear fuel it continues to grow ...

dateJul 01, 2013 in Astronomy
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