Cover Story:Gut Reaction
The vibrant ecosystem inside the human gut does more than just digest food.
Two Roads to an End
Though separated by an ocean, Christopher Plowe and Abdoulaye Djimdé are bound by their determination to stop malaria's global toll.
Into the Third Dimension
Where 2-D cell cultures fall flat, scientists are adding another dimension to keep cells happy.
Master of Regeneration
Once a high school biology oddity, planarians are moving into the spotlight to reveal secrets of self-renewal.