This week’s Science and Technology section in The Independent is online: I’ve written about how an idea spun out from Spitting Image (the satirical 1980s latex puppet show) could lead to useful wearable computers; Michael Pollitt on botnets and ‘botherds’, the 21st-century villains who shepherd attacks against online sites; and Marcus Chown examines the mystery of Kepler’s star, which shone so brightly 400 years ago.