There are an estimated 11 million undocumented immigrants living in the United States, and it's a number you might have heard a lot about this week from Washington lawmakers.
Since the 1970s, Jeff Passel, now senior demographer at the Pew Hispanic Center, has been keeping tabs on a group that actively tries to stay off the radar. He says many actually do participate in the census count and other surveys.
Despite the cold and snow, some signs of spring are starting to break through in Colorado. The public library in the small town of Basalt is trying an experiment: In addition to borrowing books, residents can now check out seeds.
In a corner of the library, Stephanie Syson and her 4-year-old daughter, Gray, are just finishing a book with a white rabbit on the cover.
When Gray approaches the knee-high shelves filled with seed packets, she zeroes in on a pack labeled "rainbow carrots."
You might look for a player along the sidelines in the Super Bowl on Sunday named Alex Smith and wonder, as he might, if he'll be the next Wally Pipp or Ken Mattingly.
Pipp was the Yankee first baseman in 1925 who had a headache and was told to take two aspirin and sit out the game. A young player named Lou Gehrig took his place — and stayed at first base for 14 years, becoming one of baseball's most storied players.
Pipp wound up working in a screw factory. He was a good sport who told fans in later years, "I took the two most expensive aspirin in history."