A couple of tasters, who claim they're unpaid and impartial, are currently chomping their way through some very expensive artificial flesh at a publicity event in London. According to the BBC's science correspondent Pallab Ghosh, who is also at the gathering, the main feedback so far is that the meat -- which is presented as a burger -- isn't as juicy or tasty as the real thing, mainly because it's totally lean. The substance was created by a team at the University of M
