Here  come the humans!
As early as 13000 B.C., Paleo (ancient) people lived in Texas.  They  may have originally come across a frozen bridge of land between Asia and today's Alaska.  If so, they slowly settled in what would one day become the state of Texas. 
These early people were nomadic hunters who traveled in small bands.  They camped when seasons offered hunting, fishing, and fruit and nut gathering.