Although it is the most cost-effective, Martin does not recommend using pen detectors. The pen recognizes if the fabric that the currency is made of is correct. So, if a criminal bleaches a $1 bill ...

In the early 2000s, the idea that you could write programs on microcontrollers that did things in the physical world, like run motors or light up LEDs, was kind of new. At the time, most people ...

If you’re looking for a cannabidiol (CBD) product to soothe your aches and pains, a topical CBD — such as a CBD cream — may be particularly useful. But how can you tell which CBD creams are ...