Discoveries and disappearances in the world of science
By Lindsey Konkel
June 7, 2009
This year, astronomers expect the fewest sunspots—magnetic storms on the sun's surface—in a century. Fewer spots indicates a cooler sun, which could cool the planet by a fraction of a degree.
Found: The edge of outer space.
Using a rocket-mounted ion detector, scientists recently pinpointed the boundary between Earth's atmosphere and outer space—it's 73.3 miles up.
For the first time, scientists quantified astronauts' muscle loss during six-month space stints: a 15 percent drop.
Found: Good fat.
A new study reveals that "brown fat" burns sugar. Docs hope to boost these cells' activity to fight obesity.