Archive: 05/10/2011

Cellphone alert system announced in NYC

(AP) -- An emergency alert system that will send messages to cellphones during disasters could have been used to warn New Yorkers of the tornadoes that hit the city last year, city officials said Tuesday.

May 10, 2011 not rated yet 1

Examining the Great Wall

Structure exists on nearly all scales in the universe. Matter clumps under its own gravity into planets, stars, galaxies, clusters, and superclusters. Beyond even these in scale are the filaments and voids. ...

May 10, 2011 5 / 5 (3) 5

Explained: Measuring earthquakes

The powerful earthquake that struck Japan in March was a 9.0-magnitude event. But this was not, as some people may assume, as registered on the Richter scale, the famed measuring system dating to the 1930s. ...

May 10, 2011 4.8 / 5 (5) 2