For over 300 million years, the ammonites ruled the prehistoric seas. Finding an ammonite fossil isn’t particularly rare ...

Confirming once more that it cannot be trusted, the metal known as fool’s gold, aka pyrite, can contain bits of the real thing, according to an Australian-Chinese research team. Getting at the trapped ...

Pyrite is a very common iron-sulfide, forming crystals with a nice yellow color and a strong metallic luster. Its shininess is so pronounced that in some ancient Mesoamerican cultures, large crystals ...