Water striders illustrate evolutionary processes
(PHYSorg.com Biology)

How do new species arise and diversify in nature? Natural selection offers an explanation, but the genetic and environmental conditions behind this mechanism are still poorly understood. A team led by Abderrahman Khila at CNRS has just figured out how water striders (family Veliidae) of the genus Rhagovelia developed fan-like structures at the tips of their legs.