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?
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.
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.
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.
Today’s soundtrack:há-de sarar, MARO This newsletter has been curated and edited by Jen Tse, Hannah Farrow, Nancy San Martín, and David Beard. Want to say hello? We’d love to hear from you: hannah.farrow@natgeo.com. Thanks for reading!
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