Engineers have unveiled a bold new concept for an interstellar spacecraft capable of transporting up to 2,400 people on a one-way, 400-year voyage to Alpha Centauri, the closest star system to Earth.

A nearby white dwarf is generating three times more energy than expected, hinting at unknown magnetic processes.

While Sid plays with his flashlight, he wonders exactly how lights work. At school, Teacher Susie explains to Sid and his friends that all lights need some kind of electricity to work, whether it ...