Sleep scientist Michelle Carr has spent years researching dreaming. She explains dream engineering, including how sensory inputs like light, sound and vibration can influence the subconscious.
Munich's famous river wave, the Eisbachwelle, vanished after a dredging in early November. Authorities are working to resurrect the beloved wave but impatient surfers have also tried their own methods.
(Image credit: Malin Wunderlich)