Astrobiologist Joshua Sebree of the University of Northern Iowa suggests that South Dakota's Wind Cave exhibits chemical similarities to Jupiter’s icy moon Europa.

Inside Wind Cave the scientists found that chemicals fossilised within the rocks shine in brilliant hues of pink, blue, and ...

It also has large amethyst geodes from Brazil ... There is a room of fluorescent minerals, which Somerton said is always a big hit with kids. Additionally, there will be two activities for ...

"But then, when we turned on the black lights, what used to be just a plain brown wall turned into a bright layer of fluorescent mineral that indicated where a pool of water used to be 10,000 or ...