As we age, our ability to balance can change. And that loss of balance can pose a serious risk. In fact, the CDC says that falling down is the No. 1 cause of accidental death for those over 65 ...

Charles H. Mattice, “Balance,” U.S. Patent 600,979 (March 22, 1898), assigned to Micrometer Balance Scale Co. Dennis J. Whelan, “Scale,” U.S. Patent 734,383 (July 21, 1903). Location Currently not on ...

Balance-scale puzzles abound in recreational mathematics. The essential element is the humble two-pan balance scale — a staple of commerce over the millennia that’s still found in bustling rural ...