"Why do parasites harm their hosts? Conventional wisdom holds that because parasites depend on their hosts for survival and transmission, they should evolve to become benign, yet many parasites cause harm. Theory predicts that parasites could evolve virulence (i.e., parasite-induced reductions in host fitness) by balancing the transmission benefits of parasite replication with the costs of host death. This idea has led researchers to predict how human interventions—such as vaccines—may alter virulence evolution, yet empirical support is critically lacking." Two papers
demonstrate empirical evidence for related models predicting the origin of virulence: [more inside]
posted by Blasdelb
on Oct 21, 2012 -
entire Flickr photostream is devoted to butterflies, because he's an "ardent butterfly lover".
posted by bwg
on Feb 7, 2011 -
"Of the four strokes swum in competition, butterfly is almost universally regarded as more exhausting than freestyle, breaststroke or backstroke. And therein lies its allure.
In an age of ultramarathons, Ironman triathlons and crowds chugging up Mount Everest, long-distance butterfly swimming
is becoming a new and less-crowded frontier for fitness fanatics." [more inside]
posted by emilyd22222
on Jun 3, 2010 -
- is just a sweet little Russian cartoon (with subtitles) (and foxes). I seem to get a little speck of something in my eyes when I watch it for some reason.
posted by Wolfdog
on Jul 14, 2008 -
Poor user interface elects George W.
The second hole on the right does not correspond to the second candidate on the left (Gore), but rather to the first candidate on the right (Buchanan). While many people will notice this, many others, especially those with poor vision, will not. About 20% of Buchanan's votes in FL came from the county that used this ballot.
posted by tranquileye
on Nov 9, 2000 -