There is no 'you are now exiting the solar system' sign at the entrance to interstellar space, so when, and perhaps if, Voyager 1 left the solar system remains a mystery - but a team says it has definitely happened by now.

Voyager 1, carrying with it Earthly greetings on a gold plated phonograph record, still-operational scientific instruments and the future plot of "Star Trek: The Motion Picture", has traveled farther from Earth than any other human-made object. 

Two laboratory studies found that the flavonoids apigenin and luteolin, found in celery, artichokes and herbs like Mexican oregano, kills human pancreatic cancer cells in vitro by inhibiting an important enzyme.

Heavy use of magnetic resonance imaging (MRI) may be leading to unnecessary breast removal in older women with breast cancer, according to a new study. The research team tracked the use of breast MRI and surgical care of 72,461 female Medicare beneficiaries age 67-94 who were diagnosed with breast cancer during 2000 to 2009.

The team found a considerable increase in the use of preoperative breast MRI over the study period from 1% in 2000-2001 to 25% in 2008-2009. The researchers also found that women who received an MRI were more likely to subsequently undergo more aggressive surgical treatment. In women who received mastectomy, 12.5% of those who had MRI received bilateral mastectomy, while only 4.1% of those who did not have MRI had bilateral mastectomy.

More people are seeking natural alternatives to medicine and products containing probiotics have flooded the marketplace. Probiotics are safe and tolerable but their value remains unknown. Studies are being done with specific illnesses to see if probiotics work and how.

A randomized, double-blind, placebo-controlled trial found that the probiotic Saccharomuces boulardii (S. boulardii) does not appear to have any significant beneficial effects for patients with Crohn's disease who are already in remission.

TERC, a gene which regulates the length of the telomere 'caps' on the ends of DNA and helps control the aging process by acting as a cell's internal clock, has been linked to cancer by a new study.

Scientists at The Institute of Cancer Research, London, found a genetic variant that influences the aging process among four new variants they linked to myeloma, one of the most common types of blood cancer. The study more than doubles the number of genetic variants linked to myeloma, bringing the total number to seven, and sheds important new light on the genetic causes of the disease. 

Kevin Hays, 19, of Renton, Washington, is studying math, in Arts  &  Sciences, and computer science at Washington University in St. Louis - and now he has a new world record in the Rubik's Cube, taking the top spot from ... himself.

Hays solved the “6x6” Rubik’s Cube in 1 minute, 40 seconds, 9 seconds faster than his previous record. The 6 x 6 cube has 36 squares per side; that’s a total of 216 squares Hays twisted and turned into perfect alignment. 

For comparison, most of us grew up trying (and failing) to solve  it did so with a standard 3 x 3 cube, which has nine squares per side.