@CNN: This cave sheltered some of the first known humans 300,000 years ago https://t.co/qH4NmZ1dmF https://t.co/oJrTfgVHsh

@CNN: This cave sheltered some of the first known humans 300,000 years ago https://t.co/qH4NmZ1dmF https://t.co/oJrTfgVHsh