Why Do We Yawn?
Why Do We Yawn?
Nigeria’s Presidential Election Pushes into Sunday
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Researchers are starting to unravel the mystery surrounding one of the most common behaviors: the yawn. WSJ's Jonathan Rockoff and evolutionary psychologist Dr. Andrew Gallup explain new studies suggesting it's a way of keeping your brain sharp. Science has disproved the theory that it's the body's way of sending oxygen to your brain when deprived. Says Rockoff, one of the leading theories is that yawning is a "cranial air conditioner." In times of stress and anxiety, we experience a slight rise in brain temperature. So the body steps in to cool it off.
Voting in Nigeria’s presidential election is being extended into Sunday after technical glitches with an electronic voter verification system caused some polling stations to suspend voting on Saturday. Photo: AP
Italy’s highest court overturned Amanda Knox’s murder and sexual assault convictions on Friday. Ms. Knox spoke to reporters outside of her mother’s home in Seattle after the verdict. Photo: AP
Gadgets seen in futuristic films like "Back to the Future Part II," and "Minority Report" are now becoming a reality, from flying cars to self-lacing shoes, to hoverboards.
When a Soyuz spacecraft launched to the ISS on Friday, NASA astronaut Scott Kelly started a historic one-year mission that will study the effects of long-duration spaceflight on humans. WSJ's Monika Auger reports. Photo: AP
Amanda Knox is acquitted of murder and sexual assault charges. Italy's highest appeals court overturned the conviction for Ms. Knox on Friday ending an eight-year legal saga. Photo: Reuters
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