To play the penny challenge, you must save a small amount of money each day for a year. On the first day, put aside one penny. On the second day, add two cents to your growing treasure trove.

Now, a new set of challenge coins minted by the state of Montana - and designed by a Montana State University student - are intended to aid in preventing suicide among veterans. Dubbed 988+1 suicide ...

This is obviously far in excess of what a coin cell can put out instantaneously, but the key is in the surprising amount of potential energy stored in one of these batteries. If the cell is rated ...

As with most coin sorters, the idea is to differentiate by size. This brings up challenge number one — the fact that a penny is ever-so-slightly bigger than a dime. [brickstudios] was able to ...