Are you ready to test your observation skills? In today’s puzzle series, you can see an inverted 49-number series. With this ...

Optical illusions are the tricksters of the puzzle world; they are designed in such a way that they fool our brains and eyes.

I’m still working through content from this summer’s Outdoor Life optics test, in which I dragooned volunteer testers to evaluate 45 rifle scopes, 17 binoculars, eight spotting scopes, and 23 thermal ...

A test standard from the International Electrotechnical Commission (IEC) has been adopted by the Telecommunications Industry Association (TIA) as an American national standard. TIA has adopted ...