Why do some neurons degenerate and die in Alzheimer's disease, but not others?

Brain's movement control centre may have had key role in our evolution

The Sounds of Titan In 2005, the European Space Agency's Huygens probe descended to the surface of Saturn's moon Titan. Microphones aboard Huygens recorded the sounds of descent and landing.

Putin's Defense Minister Hopes To Use 3,000-Year-Old DNA To Clone Ancient Scythian Warriors