Stamp collecting feels like something your grandpa would wax poetic about, but it's cooler than you think. While the odds that you'll come across one of these record-breakingly rare and valuable ...

The price to mail a letter or greeting card rose to an unlucky 13 cents 50 years ago. As 1975 ended, it was a holiday gift from the U.S. Postal Service. The 3-cent increase took effect on Dec. 31 that ...