Why Do We Yawn?
Why Do We Yawn?
Islamic State-Linked Militants Claim Afghan Attack
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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.
At least 33 people were killed in a suicide bombing in Jalalabad, Afghanistan on Saturday. Militants linked with the Islamic State claimed responsibility for the attack. Photo: Reuters
Global worries and weak earnings pressured markets into the red on Friday. WSJ MoneyBeat reporter Kristen Scholer reports. Photo: Getty
As college-bound students receive financial-aid letters how families can decipher and compare the letters? WSJ's AnnaMaria Andriotis reports. Photo: Getty
WSJ's Candace Taylor reveals details of Mike Myers' luxury duplex and a Florida estate listing for more almost $200 million. Photo: Richard Caplan
Barron's Jack Hough previews the new issue of the magazine, including a cover story on the housing sector.
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