Ukraine has ramped up its strikes on Russian military and energy targets far beyond the front lines in recent months.

The long-standing assumption that low-flying jets would not be detected is now "obsolete," Air Vice-Marshal James Beck said.

During the night of March 6, 1943, U.S. destroyers intercepted a Japanese supply force moving through the Blackett Strait.

Fred Whipple has long been recognized as a major contributor to our understanding of space and spaceflight—with contributions ...