BBC NEWS | Science/Nature | Tumours 'alter devils' sex lives'

BBC NEWS | Science/Nature | Tumours 'alter devils' sex lives': "Devil facial tumour disease (DFTD) has led to the animals mating at an unusually young age and females having just one litter, say scientists."

An example of the sexual process changing in response to an environmental factor that could potentially lead to more rapid evolution.

Scientist at Work - Edward O. Wilson - E.O Wilson Takes Cue From Ants in His Views on Human Social Evolution - NYTimes.com

Scientist at Work - Edward O. Wilson - E.O Wilson Takes Cue From Ants in His Views on Human Social Evolution - NYTimes.com: "Dr. Wilson, changing his mind because of new data about the genetics of ant colonies, now believes that natural selection operates at many levels, including at the level of a social group."

Not only does selection operate at many levels, but selection operates on the selection process itself leading to the type of exponential change that can account for the speed at which evolution occurs.