About 25 million years ago, virtually all animal life in the ocean was destroyed within 24 hours by a shock wave of intense sympathetic pain.
For hundreds of thousands of years people protected and carried embers when they traveled, until the invention of the fire drill.
An ancient matriarch had such an impact on her people that 100,000 years later women unknowingly honor her as a god.
The women of the river are descended from nomadic herders who crossed the continent thousands of years earlier.
Ancient nomads herded stronghorns until the herds died of poor forage and drought.
