The acorn woodpecker is the only bird that can eat chestnuts and acorns. These birds hide the seeds in the cracks of tree bark. Squirrels will raid the bird's hiding spots and in turn hide the seeds on the ground. Most of the seeds are eventually eaten but a few grow into large chestnut and oak trees.
American scientists discover "fat switch"
American scientists discover "fat switch" In the endless search for a magic pill to shrink
the waistline, researchers have found a fat switch-- a protein that
causes developing cells to become either muscle or fat. Both fat
and muscle cells evolve from what are called precursor cells. The
ultimate destiny in the body of some of these precursor cells is
determined by a family of 18 proteins called Wnts. In laboratory
tests one of these protens, Wnt 10b, appears to regulate production
of muscle cells. When Wnt 10b links with certain precursor cells
they develop into muscle. But when the Wnt protein is missing the
same cells will turn into fat. AUGUST 11, 2000
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