Where did the people go? Plus, the eruption of Hawaii’s Mauna Loa
| | Tuesday, November 29, 2022 | | | | |
 | IMAGE COURTESY OF MAX SHEN, GETTY IMAGES
| | Today’s biggest cities in North America include New York, Mexico City, Los Angeles, Toronto, and Chicago.
But another five cities made up the earliest population centers on the continent. One was called Spiro Mounds. Another was powerful Teotihuacan—and its imposing Pyramid of the Sun (pictured above). Haven’t heard of them? There’s a reason.
What happened to these once mighty cities? Where did the people go? And why?
Read the full story here.
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 | PHOTOGRAPH BY JOHN BURCHAM, THE NEW YORK TIMES/REDUX
| | | A desert center: From the 800s into the 1200s, a stretch of northwestern New Mexico was home to more than 150 settlements, some of which had sprawling stone mansions with hundreds of rooms. The most important of the Chaco Canyon communities was Pueblo Bonito, the center of this ancient Puebloan world. Read more. | | | |
 | | PHOTOGRAPH BY NATALIE DELIGNE, USGS | | | |
 | | PHOTOGRAPH BY DEREK VON BRIESEN, NATIONAL GEOGRAPHIC IMAGE COLLECTION | | | A strange side effect of climate change? More rainbows (like the one above in Arizona). A recent study found that climate change will shift rainbows north, giving places near the Arctic and high elevations up to 50 more rainbow-possible days a year. But just as rainbows signify risk in many cultures, more rainbows spell trouble for the planet—like more droughts in the tropics and rain in the north, Nat Geo reports. | | | |
| | Drop by drop: Nat Geo Explorer Robbie Shone trekked through Borneo’s Cave of the Winds and into the Secret Chamber to photograph scientists Stacy Carolin and Stein-Erik Lauritzen installing a drip logger (above from our Instagram). For the next several years, the device will collect and record every drop of water that falls from the stalactite above, which will help reveal how the stalagmite beneath it grows. | | | |
 | | PHOTOGRAPH BY KARINE AIGNER | | | |
We hope you liked today’s newsletter. This was edited and curated by David Beard, Jen Tse, and Sydney Combs. Have an idea or a link for us? Write david.beard@natgeo.com. Happy trails!
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