Hydrologic engineers can probably recite the Richards equation in their sleep.

Since 1931, it's been THE go-to formulate for calculating the movement of water through the vadose zone: the soil between the earth's surface and groundwater flow. Now, though, a University of Wyoming scientists claims to have cracked the code.

I honestly never thought I would be involved in a discovery in my field, says engineer professor Fred Ogden, who's been working on a simpler formula since 1994. Read More