Did ancient cave artists share a global language?

The same 32 symbols show up in prehistoric European cave art.

Photo credit: PIERRE ANDRIEU / AFP / Getty Images
  • Many of these symbols are found in caves in Africa, Asia, Australia and America as well.
  • At least 40,000 years old, the set of symbols may have been a universal communications tool.
  • Among these symbols is the iconic hashtag.
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How to learn a new language while you sleep

Sleep encoding turns out to be a real thing.

Laura Li prepares to take a nap in YeloSpa, in New York, on May 1, 2018, where New Yorkers can pay for a cabin to take a nap, and recharge energy without having to return to their homes. (Photo by HECTOR RETAMAL/AFP/Getty Images)
  • While it was believed you cannot learn new information while asleep, a new study in Switzerland makes the case for sleep encoding.
  • 41 native German speakers were introduced to a nonsense word alongside a German word to forge a relationship.
  • When tested while awake, the real word was defined by the nonsense word 10 percent higher than random chance, suggesting a bond was formed while asleep.
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Visualizing your partner's face can lower stress levels

Need to reduce your stress? Try thinking of the face of your better half.

Photo credit: Sept Commercial on Unsplash
  • A new study shows just thinking about your partner's face can lower stress.
  • Those who pictured their significant other during a stress test had lower blood pressure increases than those who didn't.
  • The results add to the pile of research that shows how great being in a relationship is for your health.
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These are the world’s longest straight lines

Researchers use algorithms to find the longest straight-line distances on land and at sea

Image: Chabukswar & Mukherjee
  • What links a small town in Portugal and a huge port city in China?
  • The answer may surprise even inhabitants of both places: the world's longest straight line over land
  • That line and its maritime equivalent were determined not by exploration but by calculation
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Do doctors warn patients enough about opioids?

About a third of doctors may not be doing enough.

(DrugAbuse.com)
  • More than 130 people die every day from opioid-related overdoses, and some 11.4 million Americans have an opioid disorder.
  • Americans remain wary of opioids and want more guidance; about a third of doctors need to explain options better.
  • Patients have to pro-actively question subscribing physicians.
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