A new study of fertility treatment found that women who get three or more embryos have no better odds of having a baby than those who get just two embryos.

They also have a greater chance of risky multiple births.

Firing on all engines, NASA's latest rover to Mars executed a course adjustment Wednesday that put it on track for a landing in August.

Deep space antennas monitored the one-ton rover nicknamed Curiosity as it fired its thrusters in a choreographed three-hour maneuver.

China and India are catapulting to the forefront of astronomy research with their decision to join as partners in a Hawaii telescope that will be the world's largest when it's built later this decade.

China and India will pay a share of the construction cost — expected to top $1 billion — for the Thirty Meter Telescope at the summit of Mauna Kea volcano. They will also have a share of the observation time.

The International Space Station is dodging a softball-sized piece of space junk.

Mission Control told astronauts to fire the station's engines briefly Friday morning to avoid a piece of an old communications satellite.

It's the dreaded sound at any live performance — a ringing mobile phone.

That's what happened Tuesday night at Lincoln Center's Avery Fisher Hall during the final movement of Gustav Mahler's Ninth Symphony by the New York Philharmonic. Maestro Alan Gilbert stopped the orchestra until the phone was silenced.

Foo Fighters and Bruno Mars both have six Grammy nominations, including album of the year. And now both acts will perform at the award show.

The Recording Academy announced Thursday that Taylor Swift, Nicki Minaj, Jason Aldean and Kelly Clarkson will also hit the stage at 54th annual Grammy Awards on Feb. 12.

Martin Scorsese isn't just nominated for a Directors Guild Award for "Hugo," but also for his documentary "George Harrison: Living in the Material World."

The Directors Guild of America announced its documentary nominees for the 64th annual Directors Guild Awards on Thursday.

At the start of "Divorce Party The Musical," a frumpy, middle-aged divorcee named Linda sits on the living room floor, bawling, comforted only by her pint of Chubby Hubby ice cream.

But, recovering in record time, she is transformed by the show's conclusion into a svelte, liberated woman, celebrating her failed marriage with a clink of mimosa glasses as confetti and streamers rain down.

Police in this border city repented Thursday over ticketing a 6-year-old boy for reckless driving, driving without a license and not having his vehicle registered after he drove his miniature motorcycle into an SUV.

The boy's mother, Karla Noriega, said police impounded the miniature gasoline-powered motorbike that her son got for Christmas after he crashed into an SUV on Dec. 27.

Two of Washington's top irritants, Mahmoud Ahmadinejad and Fidel Castro, discussed world events for two hours, and the Iranian leader on Thursday described the retired Cuban revolutionary as healthy and engaged, and declared their two countries to be allies "fighting on the same front."

"It made me enormously happy to see the comandante healthy and fit," Ahmadinejad said through a translator at an impromptu airport appearance alongside Fidel's brother, Cuban President Raul Castro, before flying off to Ecuador for the final stop in his four-nation Latin America visit.