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Science : NPR

To Keep Up With Earth's Rotation, Clocks Will Tick An Extra Second Tonight  |   

There is an extra "leap" second in Tuesday's clock. The second is designed to keep the clocks in synch with earth's rotation, but some people would like to take it away.

Flood Maps Can Get Much Sharper With A Little Supercomputing Oomph  |   

Entrepreneurs are turning to Oak Ridge National Lab's supercomputer to make all sorts of things, including maps that are much more accurate in predicting how a neighborhood will fare in a flood.

Venus And Jupiter Set For A Close Encounter Tuesday Night  |   

NASA says the two bright planets will be "a jaw-dropping one-third of a degree apart" around sunset. It's the closest they'll come in their current 24-year cycle.

11:59:60 — Look For An Extra Tick Of The Clock Tonight  |   

"Leap seconds" are added from time to time to keep atomic clocks in sync with a time standard tied to the rotation of the Earth. This will be the 26th time it's been done.

Branding Teen Drivers As Newbies Doesn't Prevent Crashes  |   

Graduated driver's licenses that impose restrictions like no driving at night have reduced crashes and deaths. But it looks like putting a learner sticker on teens' license plates doesn't help.