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01/15/2009 - Updated 05:44 PM ET
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Killer cells craftier than thought
Mouse natural killer cells in the spleen of an animal infected with a virus.
CAPTION
By Mehrdad Matloubian and Karoline Hosiawa-Meagher, University of California San Francisco
By Dan Vergano, USA TODAY
In the rough-and-tumble world of your immune system, cells don't come any tougher than the "natural...
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Week in space
Photo gallery: A universe of photos, feast for the eyes.
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An experiment in science, space and discovery
NASA at 50
Space agency at 'crossroads' after shuttle focus
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environment
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Dung deal: Elephant count surprises in Malaysia
space
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Methane plumes spotted on Mars may be a sign of life
science
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Science closing in on cloak of invisibility
environment
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Fish poop helps balance ocean's acid levels
space
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Space shuttle Discovery readies for Feb. launch
More news
discoveries
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The Nature Conservancy/AP
Possible mammoth tusk found on Calif. island
A complete tusk believed to belong to a prehistoric mammoth was uncovered on Santa Cruz Island off the Southern California coast,...
environment
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Removing cats to protect birds backfires on island
Decision to eradicate feral cats from Macquarie island to save seabirds allowed the rabbit population to explode and, in turn, destroy much...
science
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Finger length may predict financial success
Researchers at the University of Cambridge in England report that men with longer ring fingers, compared to their index fingers, tended to...
science
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By David McDonald, AP
Rare 'dinky' bird migrates to US for first time
Birders with binoculars and cameras are flocking to a remote state park in search of a small yellow-chested bird that apparently crossed...
space
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Report: NASA inspector general not catching enough
Congressional auditors say that NASA's in-house financial watchdog is doing little to unearth waste and abuse at the space agency.
space
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File photo, NASA/Reuters
NASA: Keeping shuttle costs $3 billion yearly
NASA's chief says it would cost an extra $3 billion a year to keep flying the space shuttle past next year's retirement date. Plus it would...
genetics
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Positive step for drug from engineered goat
By Elizabeth Weise, USA TODAY
In a surprise move, it seems likely the first genetically engineered animal approved for commercial use won't be a fast-growing salmon, as...
space
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Study: Black holes seem to form before galaxies
When galaxies initially formed, they weren't the first in the cosmic neighborhood. The supermassive black holes, which reside at the center...
environment
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Bush to make Pacific's Mariana Trench a national monument
By Dan Vergano, USA TODAY
President Bush will establish the largest marine reserve ever created today when he designates three remote Pacific Ocean regions as...
space
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AP
Milky Way is bigger than thought, study says
Take that, Andromeda! For decades, astronomers thought when it came to the major galaxies in Earth's cosmic neighborhood, our Milky Way was...
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