Clues from human waste could shed light on climate change and decline of Maya population | CBC News
Jul 21, 2021 1 min, 36 secs
Extreme climate changes, both wet and dry, corresponded with the population decline of a Maya settlement in central America according to new research out of McGill University that looked at indicators left behind by ancient human waste.  .

Benjamin Keenan, a PhD candidate in McGill's Department of Earth and Planetary Sciences and the study's first author, says human remains don't last very long in tropical rainforest environments — but the molecules present in human waste do.

By looking at the concentrations of fecal stanols that were preserved in the mud of the lake adjacent to the settlement, the team was able to paint a picture of population change over a period of 3,300 years.

Itzan is the "perfect setting" to use fecal stanols to glean information on the relationship between changes in population over time and extreme climate events, Keenan told CBC News. .

The climate change of the past was different from today's, which is due to human-caused greenhouse gas emissions, says Peter Douglas, an assistant professor with McGill's Department of Earth & Planetary Sciences and the senior author on the study.

While it may have been human-induced to some degree — by heavy deforestation that caused soil erosion or dried-out soil, for example — many experts say climate extremes in the Maya era were likely produced by El Niño.

"Based on what we know, the climate change that we can expect in the next 100 years is going to be, at least on a global scale, much stronger," says Douglas. .

"[This study] builds up the case that yes, when climate change happens people have to adapt and they adapt by changing their societies and moving.".

"The [Maya], they never really talked about the weather as being particularly unusual," says MacEachern, who adds that this makes it challenging for scientists to determine whether climate events caused their population decline.

1. Lindsie Chrisley announces her SPLIT from husband Will Campbell after nearly a decade of marriage - Daily Mail
Jul 28, 2021 # entertainment 47 secs
2. In a COVID-19 vaccination culture war, Cowboys' Jerry Jones has chosen his side - Yahoo Sports
Jul 22, 2021 # politics 3 mins, 8 secs
3. Flight Readiness Review gives green light for Starliner OFT-2 - -
Jul 22, 2021 # science 1 min, 43 secs
4. Britney Spears' new attorney files to remove Jamie Spears as conservator - NBC News
Jul 26, 2021 # politics 1 min, 5 secs
5. Chrissy Teigen says she could be canceled forever - Page Six
Jul 21, 2021 # entertainment 35 secs
6. Snake-Venom 'Super Glue' Can Stop Wounds Bleeding in Seconds With a Flash of Light - ScienceAlert
Jul 24, 2021 # science 50 secs
7. Tokyo Olympics live updates: Katie Ledecky completes history as American swimmers add medals
Jul 28, 2021 # breaking 32 secs
8. Alphabet Earnings Manage to Beat Big Expectations. The Stock Is Rising. - Barron's
Jul 28, 2021 # politics 52 secs
9. 10-year-old dies from plague in Colorado - New York Daily News
Jul 23, 2021 # health 19 secs
10. Does Delta Variant Mean Vaccinated People Might Still Need To Mask Up? : Goats and Soda - NPR
Jul 26, 2021 # health 1 min, 52 secs
11. 6x6 Ram TRX With 37-Inch Tires and 702 HP Sounds Like a Lot of Math - The Drive
Jul 24, 2021 # technology 28 secs
12. Man flees Australian Covid quarantine using a bed sheet - CNN
Jul 21, 2021 # health 1 min, 1 sec
13. The “most significant contribution AI has made to science”: Google’s AlphaFold will release the structure of every protein known to science - ZME Science
Jul 24, 2021 # science 1 min, 17 secs
14. Apple is reportedly amassing A15 chips for the iPhone 13 launch - CNET
Jul 26, 2021 # technology 20 secs
15. A Common Heart Problem That's Easy to Miss - Yahoo News
Jul 26, 2021 # health 1 min, 46 secs
16. Report: Apple will introduce a new iPhone SE with A15, 5G in early 2022 - Ars Technica
Jul 21, 2021 # technology 45 secs


Get monthly updates and free resources.


© Copyright 2021 365NEWSX - All RIGHTS RESERVED