Fake Sperm fool female butterflies

[Sunsol Daniels]

Did anyone read this article in science news?  

"The idea that infertile sperm discourage females from remating is old, 
but "this is the first evidence," says Penny A. Cook of Liverpool 
(England) John Moores University.  In the Feb. 11 NATURE, she and Nina 
Wedell from the niversity of Stockholm describe tests with greenveined 
white butterflies, Pieris napi."

Sally