Mummy Issues: Exhibition designers at the Penn Museum had to scramble to come up with a solution when bureaucratic issues botched a planned opening. The temporary fix? Papier-mache stand-ins for some of the world's most famous mummies.
The Tennessee coneflower is listed under the U.S. Endangered Species Act. A hybrid version of the plant, a cross between the Tennessee coneflower and the purple coneflower, was created in 2003. But experts warn that the new plant could pose a significant risk if it encroaches on the historical range of the Tennessee coneflower.
Major droughts in 2005 and 2010 cut into the Amazon's ability to absorb carbon dioxide from the atmosphere. Drought reduces carbon-absorbing tree growth, and opens the door to more forest fires, which release carbon into the air. Seen here, a Peruvian section of Amazonia.
John W. Poole/NPR