(CNN) — There were 23 separate billion-dollar weather and climate disasters in the United States last year, adding up to a total of $115 billion in damages, according to a new report from the climate ...

Nuclear clocks are the next big thing in ultra-precise timekeeping. Recent publications in the journal Nature propose a new method and new technology to build the clocks. Timekeeping has become more ...

Black Friday has become something of an anachronism in the e-commerce era. The day after Thanksgiving marks the official start of the holiday shopping season, but retailers already have spent weeks ...

WASHINGTON — Black Friday, the unofficial start of the holiday shopping season, is on Friday. Though many retailers have touted deals all month long, some are reviving the traditional in-store sales ...