In this issue:
"Sleep on It!": Your nightly rest turns out to affect your mind and health more than anyone suspected.
"Neutrinos at the Ends of the Earth": Dozens of particles from halfway across the universe have landed in the IceCube experiment at the South Pole. These messengers could help answers some long-standing cosmic conundrums.
"The Fat Gene": The genetic mutation in prehistoric apes may underlie today's pandemic of obesity and diabetes.
"Stars of the Dead": Mysterious tables of astronomical information have been found in 4,000-year-old coffins. What in the world was their purpose?