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Simple type of evolution not so simple after all

Simple type of evolution not so simple after all

When most people consider the concept of evolution, they may imagine a process by which an organism adapts to a new environment, envisioning, for example, the varied beaks of Darwin’s finches. But the vast majority of evolutionary processes don’t act to change an organism—they try to keep it the same. This type of selection pressure is known as purifying selection.

Katherine Unger Baillie

Faith leaders team up for triathlon to support mental health

Faith leaders team up for triathlon to support mental health

On Sunday, June 28, Chaz Howard will kick off the triathlon with a 1,500-meter (slightly less than a mile) swim. Josh Bolton will keep spirits high with a 24.8-mile bike ride.

Lauren Hertzler

Penn roboticists test their mettle at DARPA challenge

Penn roboticists test their mettle at DARPA challenge

In early June, Penn engineers were among the 23 teams that brought the world’s most advanced humanoid robots to Pasadena, Calif., for the ultimate test: the DARPA Robotics Challenge (DRC) Finals. There, robots had to pass a gauntlet of eight tasks that simulate what a rescue robot might be called on to perform in a crisis situation.

Evan Lerner

Processing Arrested Juveniles as Adults Has Small Effect on Criminal Recidivism, Penn Study Finds

Processing Arrested Juveniles as Adults Has Small Effect on Criminal Recidivism, Penn Study Finds

Researchers at the University of Pennsylvania have found a three to five percent reduction in the probability of criminal recidivism among a sample of juveniles arrested for felony drug offenses, some of whom were processed as adults due to their age at the time of their arrests.

Jacquie Posey

Penn Study: Americans Give Up Personal Data for Discounts, They Believe Marketers Will Get It Anyway

Penn Study: Americans Give Up Personal Data for Discounts, They Believe Marketers Will Get It Anyway

Marketers have said for years that Americans give up their data online, on apps and in stores because of the benefits they receive, such as discounts or special offers.  But a new national survey from the University of Pennsylvania’s Annenberg School for Communication rebuts this claim and offers a new explanation: resignation.

Jacquie Posey