Word: y
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...have tried to get a handle on that question is through genetics. Their studies have focused on two different types of evidence extracted from the cells of modern Native Americans: mitochondrial DNA, which resides outside the nuclei of cells and is passed down only through the mother; and the Y chromosome, which is passed down only from father to son. Since DNA changes subtly over the generations, it serves as a sort of molecular clock, and by measuring differences between populations, you can gauge when they were part of the same group...
...least you can try. Those molecular clocks are still rather crude. "The mitochondrial DNA signals a migration up to 30,000 years ago," says research geneticist Michael Hammer of the University of Arizona. "But the Y suggests that it occurred within the last 20,000 years." That's quite a discrepancy. Nevertheless, Hammer believes that the evidence is consistent with a single pulse of migration...
...have over 700 websites,” said O’Brien. “We need all the websites built on the same platform so that they’re searchable. Students often say to us, ‘why don’t you do x or y or z?’ and we say we do, but they don’t know it. Part of what an internal communications director can do is tell our story.” —Staff writer Alexander D. Blankfein can be reached at ablankf@fas.harvard.edu...
...caveat that roused all our public servants from their midwinter slumber is that Dubai Ports World is owned by the emir of Dubai, which is a part of the United Arab Emirates (UAE) and, quite shockingly, an Arab state. Claims by, among others, Sen. Hillary Clinton (D-N.Y.), Sen. Bill Frist (R-Tenn.), and Sen. Charles E. Schumer ’71 (D-N.Y.) that the deal would constitute a threat to national security, suggesting it would be akin to blessing an Islamo-terrorist “infiltration” of our ports, are both sensationalist and misleading...
Zachary A. Y. Pollinger ’09, a representative from the First Year Social Committee, said that the spaces should be specialized, suggesting options like a designated party area, a small movie theatre, and a game room...