Every year the middle of March brings a little bit of mayhem into everything the NCAA tournament, spring fever, even the return of the minty shake at a famous fast-food restaurant. But the one March event I'm particularly enjoy is St. Patrick's Day.

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If shifting the clocks forward for daylight saving time makes you uneasy, there’s a good reason: It will disrupt your sleep. When clocks move forward in the spring, we lose an hour. It’s like giving the entire nation one time zone’s worth of jet lag.

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Among the many things that set hybrid and electric cars apart from conventional fuel sippers is their silence; aside from some eerie electronic whirring, many models glide stealthily down the street. Not for long, however. After years of delays, the U.S. Department of Transportation has finalized rules that require electric vehicles and hybrids to emit sounds to alert pedestrians of their approach.

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Improvements in traffic flow and fuel consumption are boosted when even a few autonomous vehicles are immersed in bulk traffic, according to research by a Rutgers University-Camden scholar, Benedetto Piccoli, and a team of researchers who recently presented their findings to policymakers in Washington, D.C.

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