Silver certificate dollar bills can no longer be exchanged for silver. Learn how a certificate's date, grade, and unique ...

Of the duo that created 3M's now-ubiquitous Post-it Notes, Spencer Silver was, quite literally, the glue. Silver, a chemist from Texas, created the adhesive that gives Post-it Notes their stickiness.

Of the duo that created 3M's now-ubiquitous Post-it Notes, Spencer Silver was, quite literally, the glue. Silver, a chemist from Texas, created the adhesive that gives Post-it Notes their stickiness.

Of the duo that created 3M's now-ubiquitous Post-it Notes, Spencer Silver was, quite literally, the glue.Silver, a chemist from Texas, created the adhesive that gives Post-it Notes their stickiness.