Scientists have discovered the only immortal animal in nature.
The key lies in a process called transdifferentiation, where one type of cell is transformed into another type of cell. Some animals can undergo limited transdifferentiation and regenerate organs, such as salamanders, which can regrow limbs.

The New York Times on how the rise of armatures and hobbyist photographers, thru sites like flickr, are making it increasingly difficult for photojournalists to make a living.

This is simply brilliant. A virtual panorama of the Sistine Chapel.