infoholic Yup, I can dig into frozen ground as hard as concrete. The scoop has special blades and a powered "rasp' to scrape ice. Cool! Whoever thought a Nasa spacecraft could be so adept at social networking and internet? For users of Twitter, a web microblogging service, the Phoenix Mars lander has been sending pithy news "tweets' to the cellphones and computers of interested "followers.' As of Friday night, the Phoenix lander had 9,636 followers at Twitter. According to twitterholic.com, it ranks No. 30 among all Twitter feeds in the solar system. Of course, the messages are not coming from Mars. Instead, Veronica McGregor, the news services manager at Nasa's Jet Propulsion Laboratory in Pasadena, has been playing the part of Phoenix each night after she gets home from work, forwarding questions to the science team and then posting answers. "It's been amazing,' Mc-Gregor said. "I had no idea. I didn't know how many people were using Twitter.' Most twitterers use the service to send up-to-the-second news about the minutiae of their lives to friends, but Rhea Borja, a member of Mc-Gregor's team, sees it as a way to spread Nasa news to twentysomethings. "To reach a new generation of folks,' said Borja, a thirtysomething. The tweets were written in the first person, as if Phoenix the friendly spacecraft were sending out text messages to friends and fans. In part, that was to be more entertaining, McGregor said, but a larger reason was the limit of 140 characters per message. "If I had to write