One of my favorite XKCD comics:
Update, July 15, 2018: I thought of this five-year-old post tonight when seeing this tweet: Red Sprite Lightning Taken by Paul Smith on July 14,
. . . and it will reward you with wonders. Popocatépetl volcano in Mexico is currently in an active phase and I am live-blogging that.
Note: A version of this article appeared on Helium, June 15, 2011. Limestone is a calcium-based rock that has many uses in daily life.
The old earth/wind/fire/water/space system of organizing things is unscientific, but as explained in the initial post of this series, it gives an intuitive feel for
Okay – Edwin Laurentine Drake was not a trained geoscientist, but he is the reason many people still choose geology as a profession. Yet, in