C295 The Skeleton Society's Conspiracy

Niu Yun shrugged his shoulders, and didn't comment on my question, and continued to speak by himself:

"About 70,000 years ago …" Niu Yun's voice was low and ethereal, "The Doa volcano in North Sumatra Island, Indonesia erupted, causing the volcanic dust to cover the sky and drift to northern Africa. The temperature plummeted and our ancestors were affected by the volcano winter