After four years, what have we learned about the innermost planet?
A new theory suggests the Higgs field varied in the early universe, offering matter a chance to split off from antimatter
A dwarf galaxy near the Milky Way may consist of more dark matter than regular matter.* Clara Moskowitz reports
Two new “baryons” made of three quarks each are an exotic twist on normal protons and neutrons
In his new book Bell, who has sent probes to explore distant planets, tells how two craft carrying messages for extraterrestrials have journeyed farther from Earth than any other
Astronomers have discovered variable stars that periodically dim and brighten at frequencies close to the famed golden mean
Cosmologist Kendrick Smith will present a free live Webcast on the quest to understand the origin of the universe
The oldest group of terrestrial worlds now known formed some 11.2 billion years ago, more than six billion years before our sun and planets. Clara Moskowitz reports
Milestone Prizes give five teams a boost to launch a commercial lunar lander by the end of 2016
Prolific comet hunter Terry Lovejoy shares his secrets
President Obama made a rare shout-out to space in Tuesday's State of the Union Address, referencing NASA's recent Orion capsule launch and addressing astronaut Scott Kelly in the audience at the Capitol...
I remember battling sleepiness as I slouched in a large lecture hall, squinting to make out the writing on the blackboard during my freshman introductory physics course in college.
Australian amateur astronomer Terry Lovejoy’s latest comet find is naked-eye visible in the southeast sky until January 24. Clara Moskowitz reports
Amir Aczel explored jungles and ancient temples to trace the history of the number zero
Seven-month long neutrino experiment finds no signs of the rumored sterile neutrino
Books and recommendations from Scientific American
NASA’s more than half-century-old Kennedy Space Center is evolving to accommodate the next phase of U.S. space exploration
John Grunsfeld, the former astronaut who now heads NASA’s Science Mission Directorate, thinks that traveling light could get people to Mars by the 2040s
A new book and film highlight the story of four brilliant teenagers who try to chase the American dream
CAPE CANAVERAL, Fla.—After four and a half hours of flying around Earth, the new Orion capsule made a triumphant splashdown in the Pacific Ocean to end its debut mission.