The Pecos River murals are a stunning collection of monumental, multicolored rock paintings in limestone rock shelters across ...

The most common process by which limestone caves form involves carbonic acid — or weakly acidic groundwater — as the primary agent. When carbonic acid contacts limestone, it dissolves minerals in the ...

The Great Pyramid of Giza is the only wonder of the ancient world that has survived to the present day. The tomb is attributed to Khufu or Cheops, pharaoh in ancient Egypt from 2,620 to 2,580 B.C.

The notoriously large carbon footprint of cement production is a prime target for researchers looking to chip away at the problem of climate change, and we've seen how this could involve all kinds of ...