Peking Man chose Zhoukoudian as his residence because the limestone caves and crevices in the area provided an excellent habitat. The northern face of Dragon Bone Hill (Longgushan), which stands ...

And, I felt like I lost all my sense of time. So I couldn't imagine living in a cave. Back in the 1960s, a man lived in a cave, cutting himself off from everyone else for two months. As you can ...