Science Now

Science Now Discoveries from the world of science and medicine
Baby boy with DNA from 3 people offers hope for moms who would pass on deadly genetic diseases

A healthy baby boy is the first person to be born with DNA from three people, according to a medical report released Tuesday.

In addition to inheriting nuclear DNA from his mother and father, the infant also has mitochondrial DNA from a second woman who served as an egg donor.

Mitochondrial DNA consists of just 37 genes, a tiny fraction of the genetic material inside a cell.

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Teen birth rate in the U.S. hits record low for 7th consecutive year

The birth rate for U.S. teenagers hit an all-time low in 2015, the seventh straight year a new record has been set. 

Overall, there were 22.3 births for every 1,000 young women between 15 and 19, according to a report released Wednesday by the Centers for Disease Control and Prevention. That represents an 8% drop in just one year.

Declines like this add up.

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Narcissists may start out popular, but people see through them in the long run

To build a following, narcissism works. Briefly.

But if, as they say in this electoral season, you’re looking to “grow your base,” exercising emotional intelligence — expressing empathy, checking your emotions in a bid to avoid conflict, and investing in personal relationships — is a strategy that beats narcissism over the long term.

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In addition to fueling aggression, testosterone can also make men more generous, study says

Testosterone, the big daddy (if you will) of male hormones, has gotten a bit of a bad reputation, what with it being linked to bluster, aggression, violent offending and a whole raft of behaviors at which men do seem to best women consistently.

But in humans, new research suggests that’s not the whole picture.

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Try riding a roller coaster to dislodge those painful kidney stones

Just ask any one of the 300,000 Americans who, in any given year, develop kidney stones: What if the excruciating pain of passing one of those little devils could be prevented by strapping yourself into a make-believe runaway mine train, throwing your hands in the air and enduring G-forces as high as 2.5 for about three minutes? Would you do it?

Hell yeah, they’d do it.

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Geysers of water vapor shooting from Europa could offer taste of ocean within

NASA’s Hubble Space Telescope has found signs of water vapor spewing out of the surface of Jupiter’s icy moon Europa. The water appears to shoot about 125 miles high and may come from the global ocean thought to lie beneath its frozen shell.

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