People born in the 1960s or 70s may remember the children’s toy clackers. They were two hard polymer spheres attached to ...

Pale or light-colored stools can be a sign of a liver or gallbladder problem. Bile is important for stool color; without enough bile, stools become pale. Liver diseases like hepatitis or cirrhosis can ...

It is often possible to separate the reinforcement from the matrix by physical processes. For example, reinforced concrete can be broken up using machinery. This is one stage in recycling the ...