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6 March 2014 1:04 pm ,
Vol. 343 ,
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
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ScienceShot: One Black Hole Won't Ruin Your Day
22 March 2012 3:30 pm
A black hole hitting Earth sounds like the ultimate doomsday scenario. But it probably won't hurt much, say researchers who created computer simulations to see what would happen if a puny primordial black hole, born just after the big bang, struck our planet. If they exist, such black holes constitute some of the galaxy's dark matter; they're much smaller than the black holes we know about, having the masses of asteroids but the diameters of atomic nuclei. As the scientists will report in The Astrophysical Journal, the hypothetical black hole would zip through Earth in about a minute, barely shaking the world's surface the way a very weak earthquake would. Larger primordial black holes would shake the ground more but are thought to be much rarer. Don't stay up waiting for those tremors, however: Even collisions with the smallest and most common primordial black holes should happen no more than once every few million years. That's good news for everyone, except those who'd like to see whether these exotic objects really exist.
See more ScienceShots.