Reuters: Four months after his bitter election defeat, a reflective Mitt Romney said it "kills" him not to be president.
CNN: Groupon fired Andrew Mason as chief executive officer.
CBSnews.com: Today, when President Obama signs the order, the so-called sequester will take effect, and $85 billion in automatic 2013 spending cuts will begin rolling in.
Reuters.com: Scientists are teaming up with technology gurus from Amazon, Facebook and Google to design and develop a mobile game aimed at speeding the search for new cancer drugs.
CNET: San Francisco-based startup Koozoo wants cameras to record your every move in public to anticipate your needs.
Reuters.com: The thoughts of a rat romping around a lab in Brazil were captured by electronic sensors and sent via Internet to the brain of a rat in the United States.
CBSnews.com: Pope Benedict XVI has left Vatican City for the last time. He will return -- not as Pope Benedict XVI, but as Pope Emeritus -- a retired man.
AP: For many observant Muslim women, manicures have been a problem as it prevents water from making contact with nails in pre-prayer hand and arm washing five times a day.
Reuters: More than 200 businesses will urge the U.S. Supreme Court on Wednesday to strike down a federal law that restricts the definition of marriage to heterosexual union.
Reuters: A luxury real estate revival is being fueled, in part, by another resurgence: so-called jumbo mortgages - those loans, typically over $417,000, that are too big to qualify for purchase by federal agencies.
Wall Street Journal: Hoping to trim more than $1 billion in expenses annually the banking giant plans to cut costs and 17,000 positions by next year.
New York Times: Horse meat has been found in more than a dozen European countries, worrying American consumers.
Foxbusiness.com: New U.S. single-family home sales surged to their highest level in 4-1/2 years in January.