because tunnels along that line are also at depths similar to the road work under Chofu. After the cave-ins, East Nippon Expressway conducted boring tests in the vicinity but no other cavities ...

The Tokyo District Court is ordering a partial halt to the construction of an underground tunnel, which caused a ... Then, in October 2020, a cave-in occurred on a portion of a road in Chofu ...

Yechezkel. "Our initial research focused on mapping and surveying for archaeological artifacts within the spring tunnel. Cave pearls, a rare type of speleothem, were not the primary objective of ...

Researchers from the Hebrew University of Jerusalem uncovered rare cave pearls containing man-made objects within an ancient subterranean water system near Jerusalem. Their findings were recently ...