Tourists issued warning after coins damage UK’s world heritage site - The National Trust warned that the coins are causing ...

The Giant's Causeway in Co Antrim is being damaged by visitors leaving coins in the cracks of the famous stones.

Basalt is an igneous rock originating as fiery ... disinfected, and ground into flakes, then melted and spun into yarn. Dr. Peng-Cheng Ma, a professor in the Xinjiang Technical Institute of ...