And how high-contact sport affects our brains; U.S. presidential election shenanigans in 1876
|  | Wednesday, August 2, 2023 | | | | |
 | | PHOTOGRAPH BY NASA | | They share nearly all their DNA, making them ideal for research. They are much more common, moving from 1 in 50 babies before 1980 to 1 in 30 babies now.
What’s happening with twins? And how did spending a year in space drastically change the genetic makeup of astronaut Scott Kelly from his formerly identical twin brother (both above), former astronaut and U.S. Sen. Mark Kelly?
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 | | PHOTOGRAPH BY GIOVANNI BIANUCCI | | | |
 | PHOTOGRAPH BY JAYNE KAMIN-ONCEA, GETTY IMAGES
| | Early warning signs: Multiple concussions or blows to the head can cause the neurodegenerative disorder known as chronic traumatic encephalopathy, or CTE. Professional fighters, including boxers (pictured above) and football players, are at a higher risk of developing it later in life. Science has uncovered these signs to look for.
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What’s that in your hair? The Awã, an Indigenous community in Brazil, have strong connections to the animals in their forests. Above is a common sight: a black bearded saki monkey clinging to the hair of an Awã woman going about her daily life.
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 | | PHOTOGRAPH BY FOCUS ON SPORT, GETTY | | From second class to equals: U.S. women’s national soccer players once got the hand-me-downs. Until recently, they also earned much less than their male counterparts, even when they outpaced the men in winning world championships (above, the soon-to-be-world-champions in 1991). The U.S. team has narrowly advanced to the final 16 in the Women’s World Cup in its quest for a third championship in a row.
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Today’s soundtrack: há-de sarar, MARO
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