@CNN: This cave sheltered some of the first known humans 300,000 years ago https://t.co/mXMajTh3xN https://t.co/l5WJoxMr6f

@CNN: This cave sheltered some of the first known humans 300,000 years ago https://t.co/mXMajTh3xN https://t.co/l5WJoxMr6f