Math & Technology

Topic Image Rail

Brooklyn bridge

Mining pictures posted to online photo-sharing sites is revealing how tourists and residents explore their surroundings and how those environments change through time. The Brooklyn Bridge is one of the most photographed sites in New York City, a recent analysis found. 

leap second

To add a leap second on June 30, the official time will be 23:59:60 or 11:59:60 p.m.

inset of Mars from Mariner, Curiosity selfie

THEN AND NOW  The first fuzzy image of Mars (inset) from Mariner 4 in 1965 showed hints of clouds. This year, the Curiosity rover snapped a selfie while exploring Gale Crater.

Math & Technology

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