Coins can become valuable for several reasons, ranging from their historical value to their metal content. In nearly all ...

A weathered sign in the Minnesota River Valley proudly proclaims: “World’s Oldest Rock.” Erected in 1975, it marks a 3.8-billion-year-old gneiss — or so scientists thought.

The Mazda Miata, born from a design contest and debuted in 1989, has more than a million examples to its name.

Marketed as the Miata in the United States, and with a base price of $13,800, the tiny terror was eagerly embraced by ...