Archive: 04/20/2009

When every photon counts

The eyes of nocturnal mammals contain particularly large numbers of the highly light-sensitive rods, the photoreceptor type used for night vision. This allows the detection of light levels millions of times ...

Apr 20, 2009 5 / 5 (2) 0

Ecologists put price tag on invasive species

Invasive species can disrupt natural and human-made ecosystems, throwing food webs out of balance and damaging the services they provide to people. Now scientists have begun to put a price tag on this damage. In a study ...

Apr 20, 2009 not rated yet 0