Saturn's Aurora

The Cassini spacecraft orbiting Saturn has observed an effect similar to the aurorae on Earth due to a flow of electrons between the planet and its moon Enceladus. This effect was previously observed, again by Cassini, between Jupiter and its moon Io.

See BBC News.

Potential New Particle or Fifth Fundamental Force?

Fermilab scientists today announced an anomaly in their collision data at the Tevatron which could point to a previously unknown subatomic particle, or according to some a possible new extremely short distance fifth fundamental force. Either result, if verified would be one of the most important discoveries in Physics in recent decades.

See New York Times and the paper at http://arxiv.org/abs/1104.0699