This Week: Reading magma, predicting giant eruptions
In the News: Pfizer recalls birth-control pills after dosing boo-boo.
The colors of the sunset result from a phenomenon called scattering, says Steven Ackerman, professor of meteorology at UW-Madison. Molecules and small particles in the atmosphere change the direction of light rays, causing them to scatter. Scattering affects the color of light coming from the sky, but the details are determined by the wavelength of [...]