It will be ironic if Snyder's Dawn remake represents the tipping point that makes fast zombies the mainstream. George Romero's Dawn of the Dead, more than any other creature feature, hammered home the slow zombie's metaphorical possibilities. In the first Dawn, scores of shopping-mall-bound corpses ride escalators in an endless loop and wobble listlessly to Muzak. This new Dawn, though one of the best scare movies of the last few years, is far more concerned with zombie style than zombie substance: While Snyder's zombies may be mindless, they're less a consumerist mob than a bunch of high-strung car chasers. Maybe, as blogger Tim Hulsey argues, the obsolescence of the slow zombie signals the decline of the obsolescence of the slow zombie signals the decline of "mobocratic" culture in favor of a modern taste for individualism. Or maybe his background as a commercial and music video director makes Snyder constitutionally incapable of creating slow monsters. Either way, the plague of the fast zombies is upon us. Beware!

An experimental hypersonic plane has broken the world speed record by flying at seven times the speed of sound, said US space agency Nasa.

The unpiloted X-43A aircraft used a scramjet engine that could one day usher in a new generation of space shuttle propulsion systems.

It flew for 10 seconds on its own power over California, then glided for six minutes before falling into the ocean.