PERRYSBURG ­– On Tuesday, Woodland Elementary Schools’ fourth grade class capped a unit on force of drag with a parachute drop, courtesy of the Perrysburg Fire Division and its aerial bucket truck.

See how gravity accelerates a bicyclist downhill while drag slows her down. See how gravity accelerates a bicyclist downhill while drag slows her down. Design Squad is available to stream on pbs.org ...

Aerodynamics explains how airplanes fly through the interplay of four fundamental forces: lift, weight, thrust, and drag. Lift opposes gravity, thrust propels forward, and drag resists motion. Pilots ...

A new study in the journal Nature examines the distribution of dark matter in the universe, attempting to figure out if it obeys the same laws as regular matter. What it found suggests that dark ...