Humans arrived in the Florida peninsula approximately 15,000 years ago. Paleo-Indians came to Florida probably following large game that included giant sloths, saber-toothed cats, and spectacled bears. They found an arid landscape that supported plants and animals adapted for desert conditions. However, 6,500 years ago, climate changes brought a wetter landscape; large animals became extinct in Florida, and the Paleo-Indians slowly adapted and became the Archaic peoples. They conformed to the environmental changes, and created many tools with the various resources available. During the Late Archaic period, the climate became wetter again, and approximately 3000 BCE the rise of water tables allowed an increase in population and cultural activity. Florida Indians developed into three distinct but similar cultures that were named for the bodies of water near where they were located: Okeechobee, Caloosahatchee, and Glades.