Twin spacecraft recently began orbiting the earth, and the probes have been sending back strangely beautiful recordings of the sounds of space. Scientists call it the chorus. The sounds come from the magnetosphere, an area where charged particles from the sun interact with the earth's magnetic field.
The new crisis in Mexico isn't the drug war or a plunge in the peso. It's eggs. An avian flu epidemic has led to fewer, more expensive eggs — serious business in a country that eats more eggs, per capita, than any other nation in the world.
Piggybacking on a modified jumbo jet, the retired space shuttle will make its way from Florida to a permanent display site at the California Science Center. After this week's final flight, the 170,000-pound shuttle still has to navigate the streets of Los Angeles, which is no easy task.
The cost of deciphering a person's genetic code has dropped faster than the price of flat-screen TVs. But some experts are concerned that access to genomic information could stoke fears and invade privacy.
It's pretty well-accepted that the first modern humans evolved in Africa and then decided to head out. Now scientists in England say they've traced when and where they went over a 120,000 year journey. The scientists use modern population genetics as well as climate records and conclude that it was largely climate that influenced the wanderlust.
Some of the biggest human migrations coincided with major changes in climate, according to a new analysis. Researchers say early humans set out in search of climates where more food was available. And some populations stayed put in certain locations because barriers like glaciers blocked their progress.
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