"No phenomenon is a real phenomenon until it is an observed phenomenon." — John Archibald Wheeler We used to think the observer was a passive witness to the universe. What if the observer is actually ...

Heating up Physicists have shown that a colder trapped-ion qubit can warm-up faster than a hotter qubit. (Courtesy: Shutterstock/Evgenia-Fux) The inverse Mpemba ...

Heat is supposed to need something to cling to, whether vibrating atoms in a metal rod or infrared light streaming from a hot stove. Yet a series of recent experiments suggests that empty space is not ...