Male Semen Makes HIV More Potent
Component peptide ferries virus into mucosal cells, ratcheting up infectivity as much as 100,000 times More than 80 percent of human immunodeficiency virus (HIV) infections are transmitted via sexual intercourse. And researchers may have discovered at least one reason why. According to a new study published in Cell, a component of human semen may facilitate the spread of the virus by targeting imm
The Year in Robots
In 2007, our artificially intelligent companions moved closer to replacing us on the battlefield, improving healthcare (on Earth and in space) and even befriending our children Last week's announcement of Japan's "Robot of the Year" for 2007—a mechanical arm capable of grabbing 120 items-per-minute from a conveyor belt—marked an anticlimactic end to what has otherwise been a good year in the advan
Grass Makes Better Ethanol than Corn Does
Midwestern farms prove switchgrass could be the right crop for producing ethanol to replace gasoline Farmers in Nebraska and the Dakotas brought the U.S. closer to becoming a biofuel economy, planting huge tracts of land for the first time with switchgrass—a native North American perennial grass (Panicum virgatum) that often grows on the borders of cropland naturally—and proving that it can delive
National Geographic
The 6 best weighted blankets for a calm, comforting sleep
National Geographic
The 6 best weighted blankets for a calm, comforting sleep
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