Word: limbs
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Dates: during 1990-1999
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Researchers at Harvard Medical School (HMS) have identified a gene that is responsible for determining upper and lower limb development...
Their work showed that the gene, designated Pitxl, can partially transform the upper limb of a vertebrate into a structure resembling the lower limb...
Scientists have long been puzzled over how the forelimb and hindlimb develop, as the same genes for development are active in all four limb buds in the embryo. Logan and Tabin determined that additional wing- and leg-specific genes are involved in limb development...
...until a few years ago, we didn't understand how a limb was created," Tabin said...
Byrd's murder was a heinous crime against a man and his family, but it was also something larger. Lynching is the iconic Old South crime, used to punish slave insurrections. Lynch mobs traditionally hanged their victim from a rope tossed over a tree limb. But dragging deaths were not uncommon, first from horses, later from cars and trucks. Lynching was at once a brutal act of vigilante injustice and a larger statement--a warning to blacks to remain subservient...