Researchers in Germany traced the population boom to breeding between the native European spiders and an isolated colony living near the Black Sea.Molecular Ecology reports the genetic mixing resulted in generations rapidly adapting to living in colder climates.

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The pupa or young harvest fly in the tree is brown also. The harvest fly, or cicada, often incorrectly called locust is usually the herald of hot weather.

He comes out in August, and the hotter the day the more energetically he sings.

The concept that biodiversity feeds upon itself is an old idea, but it's difficult to prove because it requires biologists to simultaneously catch several species red-handed just as they are becoming new species. A new study from biologists at Rice University, the University of Notre Dame, Michigan State University, the University of Iowa and the University of Florida finds that ongoing evolutionary changes in one fruit fly species are having a domino effect on at least three species of predatory wasps.

The researchers focused on the jump of a native North American fruit fly onto apple trees in the 1850s.

As overt racism has become less socially acceptable, most artists have become less bigoted or simply toned down the ignorance in their artistic social commentary, but a select few still stoke the fires of insensitivity with caricatures of President Barack Obama that are both racist and disrespectful to the office he holds.

With race still an issue in the 2012 Presidential Election taking place today, take a look at The 50 Most Racist Political Cartoons to see how far the country has come.Temperature tolerance is key to the spread of wasp spiders into northern Europe, according to scientists.Since the 1930s the distinctive spiders have expanded their range from the Mediterranean coast to Norway."Our new work takes a close look at the evolutionary process termed 'sequential speciation,'" Egan said."Sequential speciation identifies the fact that adaptation and speciation of one species is not an isolated process."The new study extends the earlier work by showing that new fruit fly species provide suitable habitat not just for one new parasitoid species, but for multiple new species," said study co-author James Smith, a Michigan State entomologist. "Speciation cascades provide one explanation for how a lot of species might be generated in a relatively short period of time." Glen Hood, a Ph. student at Notre Dame and lead author of the paper, said, "Our study has impacted our understanding of evolution by suggesting that change in individual lineages can reverberate through different trophic levels of an ecosystem and increase community-level biodiversity." Rice University.