Researchers have found that we order and process learned experiences while we sleep. Some people can even train physical skills while dreaming. Also: Why blue light perks us up. And: Delivery by drones.
Anyone who is sedentary for an extended period runs the risk of his arms or legs falling asleep. How exactly does that happen and are there any risks?
Contrary to North Korean claims, doctors treating Otto Warmbier have said the 22-year-old's coma was induced by respiratory arrest and a lack of oxygen in the brain. Warmbier was released from a Korean prison on Tuesday.
Otto Warmbier, a student held in North Korea for over a year who died shortly after returning to the US, showed no obvious signs of torture, an Ohio coroner said. That contradicts what Warmbier's parents said they saw.
As India celebrates the 70th anniversary of its independence from British rule, many of the tasks the nation's founding fathers set for the leadership and people remain unfulfilled, says DW correspondent Kuldeep Kumar.
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