- NewsA unique stellar threesome could help astronomers test the leading theory of gravity to unprecedented precision.
- News in BriefA smaller size in first trimester of pregnancy has been linked to heart-health warning signs in childhood.
- It's AliveThe more eclectic hoarder species segregate pantry from lumber room from junk museum. The result is more orderly than the closets of some human packrats.
- Reviews & PreviewsFor centuries after Columbus, the flora and fauna of the New World remained a mystery to Europeans. But in the 1600s and 1700s, explorers began to visit and describe what were then considered remote corners of the Earth.
- 50 Years AgoThe lunar surface turns out to have more grit than scientists thought.
- Reviews & PreviewsOn only five occasions in Earth’s long history has a large fraction of the planet’s biodiversity disappeared in a geological instant. But, journalist Kolbert reminds us in her new book, we are well on our way to making it six.
- Letters to the EditorReaders discuss the names of really big numbers and whether Lamarckian evolution is making a comeback.
- Editor's NoteThe greatest promises of brain research — a cellular description of thought and behavior and, even more importantly, strategies to battle disorders of the brain — have yet to be fulfilled. Making good on those promises is the motivation behind the federal BRAIN Initiative.