These circumstances triggered the cave-ins and cavities ... project being undertaken by Central Japan Railway Co. because tunnels along that line are also at depths similar to the road work ...

Researchers Accidentally Discover "Unique" Collection of 'Cave Pearls' in an Ancient Tunnel, Baffles Them Researchers have ...

Researchers have found a "unique" collection of "cave pearls"—some of which contain archaeological artifacts—in an ancient tunnel, a study has reported. Cave pearls are a type of "speleothem ...

taking years and requiring advice from experts in digging tunnels under the Austrian Alps. Occasional cave-ins were just one of many challenges. The location was so remote that it was impossible ...

The tunnel is reinforced with iron plates throughout to prevent cave-ins. Railroad ties for a tram line and rusted weapons remain where they were left. The tunnel comes to a dead end about 150 ...

In an ancient tunnel, a collection of "cave pearls" was discovered, with some of them containing Greek artifacts from the Hellenistic era. Cave pearls are a kind of "speleothem," which is a ...

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 ...

"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 our ...

Four Portuguese cavers have been rescued after a sudden flood trapped them in a cave network in Cantabria, northern Spain. The four, from a climbing club in Porto, went missing on Saturday in the ...