Green Matters on MSN

These Towering Crystal Structures Rising From Cave Floors Follow a Mathematical Rule With Precision

Called 'stalagmites,' these crystal structures hold the past record of the cave's geological history. The secret lies in ...

How to watch the Orionid meteor shower, debris of Halley’s comet

The Orionid meteor shower peaks this year with the arrival of a new moon, offering a rare chance to see shooting stars ...