Some pipes are in spots too tight to fit a saw or other tool for cutting. Mason’s line, a cheap, sturdy nylon string can get the job done, and quickly saw through other things like rope too. In this ...

The Hohle Fels baton, made from 15 pieces of ivory unearthed in 2015. H. Jensen, University of Tübingen A roughly 35,000-year-old woolly mammoth tusk found in 2015 was used by early humans as a tool ...