And why we don't know more. Plus, breaking a centuries-old code; a fallen ancient empire; and a cellist making a difference.
| | Thursday, February 9, 2023 | | | | |
 | PHOTOGRAPHS BY ELIZABETH DALZIEL
| | Fifty-two remains the average age for American women to experience menopause, though it can happen in the 40s or 60s.
Technically, it’s when estrogen levels have dropped so low that ovulation and menstruation permanently cease. What do we know about the “change” and its relation with hot flashes and depression? And why don’t we know more?
Read the full story here.
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| | First came the sleep loss: In perimenopause, the impact of lost sleep “carries on throughout the day, you are not able to concentrate, you feel exhausted, and have no patience,” says Rachel Woods, 49 (pictured above). Hormone replacement therapy has helped. At top, Lisa Davis, 44, described “mood swings and a fuzzy brain” from menopause. Read more. | | | |
 | | PHOTOGRAPH BY MERLIN TUTTLE, SCIENCE SOURCE | | | |
 | | PHOTOGRAPH BY ALI BALIKCI, ANADOLU AGENCY/GETTY IMAGES | | What caused this empire to vanish? For more than four centuries, the Hittites ruled over what is much of modern-day Turkey and Syria. Then, suddenly, gone. Researchers theorized that quakes, volcanos, pirates, or disease led to the swift downfall, but the study of 3,200-year-old trees points to another cause. Click here to find out. (Above, stone lions from the ancient Hittite capital of Hattusa in central Turkey.)
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 | | PHOTOGRAPH BY EMORY KRISTOF | | Honoring a legend: Nat Geo Explorer Emory Kristof was a pioneer in deep-sea photography, using submersibles and remote controlled imaging systems to capture never before seen depths. He started as an intern at Nat Geo in 1963 and went on to photograph discoveries like the Titanic (above). “He stood tall as a pioneer of the deep and now others stand on his shoulders to reach farther, or in this case, deeper…as it should be,” said Nat Geo Explorer David Doubilet, an ocean photographer. Kristof died Monday at the age of 80.
See: The discovery of the Titanic through Kristof's eyes
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 | | PHOTOGRAPH BY AUSTIN MANN | | ‘His whole heart was smiling’: That’s how one colleague described cellist Yo-Yo Ma, whose musical comfort to victims of this week’s quake in Turkey and Syria reflects his humanistic, heartfelt personality. Here’s our 2021 profile of the virtuoso (pictured above in Indonesia) on a six-continent tour, playing Bach and promoting the environment and social justice.
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Today’s soundtrack: Build a House, Rhiannon Giddens featuring Yo-Yo Ma
Hear Rhiannon Giddens talk about the hidden history of the banjo on this week’s Nat Geo podcast, Overheard.
Today’s newsletter was curated and edited by David Beard, Sydney Combs, and Jen Tse. Let us know what you think and send us story ideas here. Thanks for reading! | | | |
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