funeral service.

The Canadian Press

As U2 wrapped up their first concert in Moscow Wednesday night, lead singer Bono surprised about 55,000 fans in the audience by calling Russian rocker Yury Shevchuk, a critic of Prime Minister Vladimir Putin, on stage.

“You might know this man,” Bono said to the crowd. The pair performed Bob Dylan's classic “Knockin' on Heaven's Door,” with Shevchuk, frontman for the Russian rock group DDT, singing a Russian version before joining Bono on the original tune. Shevchuk left the stage shouting “Russia.”

On Sunday, as U2 arrived in Moscow, Shevchuk took part in an illegal rally in downtown Moscow to protest the construction of a highway through a forest northwest of the capital. At a meeting with Putin in May, Shevchuk assailed the suppression of opposition protests.

U2'sJerry A. Coyne is a Professor in the Department of Ecology and Evolution at the University of Chicago. He received a B.S. in Biology from the College of William and Mary and a Ph.D. in evolutionary biology at Harvard University. After a postdoctoral fellowship at The University of California at Davis, he took his first academic position as assistant professor in the Department of Zoology at The University of Maryland. In 1996 he joined the faculty of The University of Chicago and has been there ever since.

Coyne’s work has been largely concerned with the genetics of species differences, aimed at understanding the evolutionary processes that produce new species. He has written 115 scientific papers and more than 130 popular articles, book reviews, and columns, as well as a