The internal combustion engine, for all its mechanical sophistication, still runs on a 19th-century mechanical idea: pistons rising and falling, a crankshaft spinning, a steam-age architecture ...

The F-22 Raptor fighter jet is being integrated with the MQ-20 Avenger drone—leading to hopes that the two might pair up in future air combat.

This is the worst weather I’ve ever seen,” Bourne Assistant Fire Chief Joseph J. Carrara Jr. said on Monday afternoon.