Learning From Lyme
Decreasing biodiversity may be related to the increase in cases of Lyme disease in humans.
El Niño to La Niña
In 2010, El Niño switched quickly to a strong La Niña, resulting in intense weather.
On Shaky Ground: Building a Safer Future in Haiti
Scientists map Port-au-Prince's earthquake zone in detail for the first time.
Brown Dwarfs: Tail End of the Stars
The search for the intermediate objects between stars and planets.