Dark Matter - June 2008 Turns out most of the universe is held together by a mysterious, invisible substance.
Of Mice and Memory - June 2008 Mice placed in enriched environments can recover lost memories, giving hope to those who study Alzheimer's.
Profile: Hany Farid - June 2008 This self-proclaimed "accidental scientist" is a digital detective inventing new ways to tell if photos have been faked.
Wisdom of the Crowds - June 2008 Ask enough people to estimate something, and their combined guesses will get you surprisingly close to the right answer.