Science : NPR
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.
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.
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.
"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.
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.
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