For years, an elaborately displayed tooth at the Art Institute of Chicago has been thought to belong to the major Christian religious figure John the Baptist. As it turns out, that claim has no teeth.

Perhaps originally placed inside an altar or a tabernacle, this particular reliquary is decorated above ... Its diminutive size encouraged intimate engagement and personal contemplation of Christian ...

That’s par for the course on the red planet, but there was something very different about this rock. It had a surprise inside: pure sulfur crystals, something never before seen on Mars.