Peter Diamond, a Massachusetts Institute of Technology economics professor, beams during a Cambridge, Mass., news conference shortly after he won the 2010 Nobel Prize in economics on Oct. 11. Stephan Savoia/AP hide caption

itoggle caption Stephan Savoia/AP

Biologists are relocating species such as this juvenile Mojave Desert tortoise due to the planned construction of BrightSource Energy's solar plant in southern California. Sarah McBride for NPR hide caption

itoggle caption Sarah McBride for NPR

Arizona state Sen. Russell Pearce speaks in April during a vote on SB 1070, the immigration bill he sponsored. The final version resembled "model legislation" he helped draft during an ALEC conference in Washington, D.C., last year. Ross D. Franklin/AP hide caption

itoggle caption Ross D. Franklin/AP

Tony Hawk founded the Tony Hawk Foundation in 2002 to promote and help finance public skateparks in low-income areas. Rebecca Joelson hide caption

itoggle caption Rebecca Joelson

Workers at the Cadbury chocolate factory in Bournville, England, join together chocolate Easter egg halves. Cadbury’s cream-filled eggs were first introduced in 1923. Fox Photos/Hulton Archive hide caption

itoggle caption Fox Photos/Hulton Archive