In the past 50 years, sperm counts in men worldwide have fallen by roughly 50%. Environmental factors may be playing an important role in this process. A new Swiss study indicates that sperm quality might correlate with whether men live in the city or in the countryside. Also: For more than 40 years, researchers from the University of Zurich have been observing dolphin behavior in Shark Bay on the west coast of Australia. Are females adapting better to rising water temperatures and climate change than males are? Rice plants are sensitive to air pollutants. A newly bred ozone resistant variety could help increase yields. And: is there intelligent life beyond our planet? And how likely is it that we will ever find it?