- How many ice ages has the Earth had, and could humans live through one? https://theconversation.com/how-many-ice-ages-has-the-earth-had-and-could-humans-live-through-one-179360 7 comments environment
Linked pages
- Creative Commons — Attribution 4.0 International — CC BY 4.0 https://creativecommons.org/licenses/by/4.0/ 95 comments
- Homo neanderthalensis | The Smithsonian Institution's Human Origins Program http://humanorigins.si.edu/evidence/human-fossils/species/homo-neanderthalensis 8 comments
- Fossilized Footprints - White Sands National Park (U.S. National Park Service) https://www.nps.gov/whsa/learn/nature/fossilized-footprints.htm 1 comment
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