An argument in favor of private property rights for Moon and Mars colonies. Read the full story.

Talk Soup: Jordan's language skills are growing tremendously, and she's starting to combine words into phrases, including "Hi Daddy" and "Hi Mommy!" This is very cool, and surprising -- I mean, heck, I knew she'd be talking eventually, but it's downright shocking the first time you ask a question, and get a real answer back.

She's very enthusiastic about trying to talk, and she's started uttering phrases that she thinks are completely obvious, at least to a 16 month old. Last night she was looking at me and saying "Gah Gah!" Now this may be a staple of toddler-speak, but I don't have a clue what she was referring to, and my efforts to have her point it out failed miserably.