U.S. Shark Attacks

52: Number of unprovoked shark attacks in the U.S. last year (compared with 20 elsewhere in the world). None were fatal. 28: Number of attacks in Florida, the most of any state. Runners-up were Hawaii (seven), South Carolina (five), California (four) and North Carolina (four). 65%: Percentage of attacks involving surfers (or people doing other board sports); 32% involved swimmers. The rest involved […]

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Time travel

Sorry, science-fiction fans: Time travel is impossible.  That is the sobering conclusion, anyway, of a Hong Kong-based team of physicists.  They found that the maximum speed of a single photon, the basic unit of light, “obeys the traffic law of the universe,” Agence France-Presse reports.  The photon cannot go faster than the speed of light—186,282 miles per second—and thus provides […]

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subways “teeming with life”

Researchers who swabbed and tested DNA from surfaces in New York City’s subway system identified 562 species of bacteria, including microbes from mozzarella, sausage, hummus, kimchi, sauerkraut, rats, mice, and lice. Geneticist Christopher E. Mason said the bacteria found were not sufficient to cause disease, but that his work revealed the subways to be “teeming with life,” like “a rain […]

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