Tubes made of unknown materials were discovered in 2002 on Mount Baigong in China's Qinghai province that were dated to around 150,000 years old, a time when humans were not supposed to have reached the region. The tubes were created using materials that did not exist at that time, suggesting the existence of an ancient human society that left no historical trace and may have built structures like pyramids on Mount Baigong that were eroded by the environment over time, leaving scientists unable to explain how given the technology available to humans in that era.

1. Mysteries of the past

2. The tubes of Baigong
The tubes were found in 2002 at Mount
Baigong,in the province of Qinghai(China).
The scientific analyzes indicate that the
tubes were around 150 thousand years old
(period in which, it is supposed,the humans
hadn’t even reached China). It was created
by materials that at that time didn’t exist,
an ancient human society that would have
disappeared without a trace in history. The
theory is that the mount Baigong has a
structure that looks like pyramid that was
“devoured” by the environment. How? If at
that time they didn’t have this materials?
Nobody knows.