The new hydrogen engine, while still in development, has thermal efficiencies above 60 percent. In comparison, diesel engines ...

A sudden halt for technology stocks put the brakes on Wall Street's record-setting run. The S&P 500 dipped 0.2% Tuesday from ...

Temperatures have been brutal the last few days in Boston. Tuesday's record-setting triple-digit "air you can wear" did not stop everyone from getting out in some of the hottest recorded temperatures ...

Online shoppers spent a record $24.1 billion during Amazon.com Inc.’s annual Prime Day sales event, a more than 30% increase from a year ago, according to data compiled by Adobe Analytics, which ...

The first day of summer is ushering a dangerous heat wave in several regions across the United States. Subscribe to read this story ad-free Get unlimited access to ad-free articles and exclusive ...