Part 9/15:
- Mass Extinctions and Human Impact: Evidence suggests a staggering reduction—up to two-thirds—of human populations and megafaunal species, including mammoths, mastodons, saber-tooth cats, giant sloths, and early human cultures like Clovis. The coincidence of impact proxies with demographic collapses bolsters the impact-hypothesis over other theories like overhunting or climate change alone.