Within 1,000 years of humans migrating into the Americas, more than 114 species of large plant-eaters, including woolly mammoths, giant camels, and ground sloths, went extinct.
Notes on verification
Matches peer-reviewed Nature Geoscience study (Smith et al. 2010) and is corroborated by multiple independent secondary sources (phys.org, Smithsonian, science blog) reporting the same 114-species figure and 1,000-year timeframe. [cascade flags: aggregator_dropped_primary_exists | tier=silver indep_score=0.95 clusters=3 claim_tier=notable]
Sources
- Mammoth-Belch Deficit Caused Prehistoric Cooling? (seed:history_and_archaeology)
- https://blog.everythingdinosaur.com/blog/_archives/2010/06/05/4545196.html (corroboration)
- https://www.nature.com/articles/ngeo877 (corroboration)
- https://insider.si.edu/2010/06/killing-of-methane-producing-megafauna-may-have-caused-cooling-13000-years-ago (corroboration)