If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

Rare coins worth thousands really do slip through everyday wallets, so it pays to check your change before spending it. I focus here on specific dates, mint marks and errors that experts flag as ...

One of the coins created to commemorate the United States' 250th anniversary will begin circulating on Monday, Jan. 5, the U.S. Mint announced on social media. The Mayflower Compact Quarter is the ...

Brits have been urged to check their £1 coins for a tiny error that could make it worth £2,500. However, this valuable mistake can be “difficult to spot”. In a ...

People are being encouraged to examine their £1 coins for a tiny manufacturing flaw that could potentially increase their value to £2,500. This lucrative mistake can be "difficult to spot". In a video ...

Add Yahoo as a preferred source to see more of our stories on Google. One of the coins created to commemorate the United States' 250th anniversary will begin circulating on Monday, Jan. 5, the U.S.

Brits have been urged to keep an eye out for a coin in circulation that could be worth as much as £150. This piece from 2009 is known as the “second rarest” 50p currently in use in the UK. In a post ...