A fresh dusting of snow over Park City heralded the beginning of the Sundance Film Festival on Thursday.

Sundance Institute founder Robert Redford opened the festival by characterizing the slate of 117 feature films as products of "dark and grim" times and the "suffering from a government that's in paralysis."

Scientists working in the dense jungles of Indonesia have "rediscovered" a large, gray monkey so rare it was believed by many to be extinct.

They were all the more baffled to find the Miller's Grizzled Langur — its black face framed by a fluffy, Dracula-esque white collar — in an area well outside its previously recorded home range.

NBC comedy "30 Rock" often finds laughs in real-life events in the show business world it inhabits.

But Thursday's edition targeted one of its own cast members, Tracy Morgan, who found himself in real-life hot water last June after making anti-gay remarks during a stand-up appearance in Nashville, Tenn.

Third-seeded Victoria Azarenka has advanced to the fourth round of the Australian Open, winning a matchup between champions of two warm-up tournaments when she beat Mona Barthel 6-2, 6-4 on Friday.

Azarenka, who beat four seeded players including French Open champion Li Na to win the Sydney International last week, has only lost eight games at Melbourne Park en route to the Round of 16.

Roger Federer made the most of his rare opportunities Friday against the fastest serve in tennis, cashing in with some classic returns in a 7-6 (6), 7-5, 6-3 win over Ivo Karlovic to reach the fourth round of the Australian Open.

The four-time Australian Open champion fended off Karlovic's set point in the tiebreaker with a return that brought the 6-foot-10 Croatian to the net, then lobbed just over him.

Mexico enacted tough new rules Thursday to ban advertising of "miracle cures" for weight loss, sagging body parts and more serious illnesses like prostate ailments, chronic fatigue and even cancer.

Mexico has a long history of faith healers and home remedies, but the problem has come to a head in the last few years with a constant stream of ads on television for more "scientific" sounding creams that supposedly lift or enlarge breast and buttocks, magnets that help users lose weight, or pills and powders that cure gastric problems or diabetes.

Good news: Sex is safe for most heart patients. If you're healthy enough to walk up two flights of stairs without chest pain or gasping for breath, you can have a love life.

That advice from a leading doctors' group on Thursday addresses one of the most pressing, least discussed issues facing survivors of heart attacks and other heart patients.

A new government study suggests a lot of teenage girls are clueless about their chances of getting pregnant.

In a survey of thousands of teenage mothers who had unintended pregnancies, about a third who didn't use birth control said the reason was they didn't believe they could pregnant.

Twitter has acquired Summify, a Vancouver-based social news aggregator.

"We're extremely excited to announce that Summify has been acquired by Twitter!" Summify announced on its website on Thursday.

The director of Interpol says there is no specific intelligence the Olympics will be targeted.

Ron Noble, secretary-general of the international police agency based in France, also said Thursday that Britain does a good job of screening identification documents against the Interpol database as part of its security procedures.