Pleistocene

Colossal Foundation Invests $500K to Restore America’s Largest Tortoise to the Southwest

by | Nov 13, 2025
The Bolson tortoise is North America's largest and rarest tortoise species. Its population has grown from 23 adults to over 800 individuals through captive breeding, with over 150 juveniles released since 2021 showing 80%+ survival rates.
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