@CNN: This cave sheltered some of the first known humans 300,000 years ago https://t.co/kGVHoN9WV2 https://t.co/OWsu5uxtHb

@CNN: This cave sheltered some of the first known humans 300,000 years ago https://t.co/kGVHoN9WV2 https://t.co/OWsu5uxtHb