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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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Video: Crayfish Urine Sparks a Lover's Tiff
29 March 2010 7:00 pm
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Credit: Fiona C Berry and Thomas Breithaupt, University of Hull, U.K.
Strange courting rituals run rampant throughout the animal kingdom, but female signal crayfish (Pacifastacus leniusculus) may take rank for their cruel mind games. Videos of the fish reveal that females release pheromones in their urine to attract suitors but that when a male arrives, she fights him. The authors, reporting today in BMC Biology, suggest the females may use these unconventional tactics to access the strongest and most fit mates. Those males who are rough and tumble enough to overcome the feisty females win access to her eggs.