Scientists have just unearthed the oldest beds ever found — made from grass and ash deep in a South African cave. They say ...

DOAN” carved into one of the walls. Joseph Fell then visited the cave and saw the initials himself. The cave was filled in ...

Experts subsequently learned that lint that stays on cave walls too long eventually is incorporated into ... broken concrete, rocks, sand, and dirt, most of which date back to the first half of the ...