New techniques to detect Y chromosome genes show frequent loss of the Y in tissues of older men. The increase with age is clear: 40% of 60-year-old men show loss of Y, but 57% of 90-year-olds.
The return to civilian rule in 1999 raised hopes for a new chapter rooted in constitutionalism, accountability, and growth. More than two decades later, democracy has survived, but it has yet to ...
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