May 23, 2011
WiggleZ Project Confirms Dark Energy's Effects
A survey of 150,000 galaxies confirms predictions about dark energy, thought to be what's driving galaxies apart. John Matson reports
Cosmology
May 19, 2011
Big Space: The Scale of the Solar System
Bring Science Home: Activity 14
JOIN US ON THE MONARCH MIGRATION. LEARN MORE.
Space & PhysicsMay 17, 2011
Space Is an Elaborate Illusion
The SciencesMay 11, 2011
Accelerated Expectations: All Eyes on Large Hadron Collider in Dark Matter Hunt
Researchers from a number of overlapping disciplines are awaiting a big boost from the world's largest particle collider
Space & PhysicsMay 9, 2011
Array of Hope: Australia and South Africa Vie for Massive Radio Telescope Project
The ambitious, unprecedentedly vast Square Kilometer Array project should open up new realms in astrophysics. But will it live up to its name?
May 9, 2011
Milky Way Should Have Much More Companionship
Our understanding of dark matter says the Milky Way should have many times more than its dozen or so small satellite galaxies. John Matson reports
Space & PhysicsMay 6, 2011
WIMP Wars: Astronomers and Physicists Remain Skeptical of Long-Standing Dark Matter Claim
An Italian research group has for years trumpeted a cyclical ebb and flow in particulate activity that the researchers ascribe to dark matter. But support for the claim has been hard to come by
The SciencesMay 4, 2011
Garrett Lisi Responds to Criticism of his Proposed Unified Theory of Physics
May 2, 2011
Comet Bops Past Neptune Cleanly
Comet Hale-Bopp has been spotted beyond the orbit of Neptune, far enough from the sun to be without its dirty tail. John Matson reports
Space & PhysicsMay 1, 2011
The Lost Galaxies
By the latest estimate, the observable universe contains 200 billion galaxies. Astronomers wonder: Why so few?
EnvironmentMay 1, 2011
Recommended: The Fate of Greenland
Books and recommendations from Scientific American
Space & PhysicsApril 24, 2011
Budget crunch mothballs telescopes built to search for alien signals