2011 has been a momentous year in the 30-year-old AIDS pandemic.
The big breakthrough was the discovery that antiviral drugs can prevent someone who's infected with HIV from passing the virus to others. It's nearly 100 percent effective. That led President Obama to declare earlier this month that the U.S. will expand HIV treatment in hard-hit countries by 50 percent.
Reason To Smile: Samuel Palmisano, president and CEO of IBM, walks by an IBM logo at the CeBIT technology fair in Hanover, Germany. Palmisano is set to step down later this month, and Virginia Rometty will take over on Jan. 1.
Far from a relic, IBM has been one of the best stocks on the Dow this year, rising more than perennial tech hotshots Google and Apple. The company may be 100, but it has totally remade its business for the 21st century.
The company sold its PC business 6 years ago, and now, more than 83 percent of its business is services and software. Sign a contract with Big Blue and you get consulting, cloud computing, servers, analytics, even financing.
"There is no such thing as an IBM PC," says IBM managing partner Adam Klaber.
Credit William Keener / Golden Gate Cetacean Research
A group of harbor porpoises in San Francisco Bay, photographed from the Golden Gate Bridge. Harbor porpoises haven't been seen in the bay since the 1930s. Researchers believe World War II activity may have contributed to their disappearance. The Navy strung a seven-mile underwater net across the mouth of the bay to keep out enemy submarines.
Something that has been missing from San Francisco Bay since World War II appears to be making a comeback: Harbor porpoises are showing up in growing numbers, and researchers are trying to understand why they're returning.
The walkway across the Golden Gate Bridge is almost always packed with people taking photos. But Bill Keener isn't here for snapshots of the stunning views. He's aiming his massive telephoto lens at a dark shape in the water 200 feet below.
Ah, we still do the town on New Year's Eve, but tearing the goal posts down is now verboten. Deemed too dangerous. In fact, as our new year approaches, it's a good time to look back on several other things in sport that have long since faded away.
Who remembers, for example, that at the end of each inning in the field, baseball players would just chuck their gloves onto the grass behind their position, leaving the field littered with mitts. All game long.
A company that provides identity protection services is sifting through the data released by hackers over the holiday weekend and and they're detailing what hackers were able to steal from Stratfor, a security think tank.
If you haven't heard, hackers who claim an affiliation with the group Anonymous broke into the servers of Stratfor, made public some data and used some of the stolen credit card numbers to, in some cases, make charitable donations.
Mitt Romney's campaign stops Tuesday in New Hampshire, at small restaurants with largely invited crowds, featured lofty patriotic themes and seemed designed to help him lock down his current base of support in the Granite State.
"America the Beautiful," the Founding Fathers, the Declaration of Independence and the Constitution were referenced by the GOP presidential contender during his last bit of stumping in New Hampshire before heading off for a three-day bus tour of Iowa, which holds its caucuses in a week.