Sierra Northern Railway (SERA) on April 8 reported successfully completing testing of its first four-axle, hydrogen fuel cell-powered (HFC), zero-emission switcher. The test, SERA said, took place ...

Citizen has unveiled the latest addition to its Series 8 831 mechanical line of watches, a limited-edition ice blue release.

Researchers studying wild chimpanzees at Gombe National Park in Tanzania found that the apes selected tool materials based on mechanical properties that align with the laws of physics.