from the we're-whalers-on-the-moon-we-carry-a-harpoon dept.
smooth wombat writes "China has announced that it plans to land on the moon around the year 2017. They also plan to set up a moon-based astronomical telescope, measure the thickness of the moon's soil as well as the amount of helium-3 on the moon. Helium-3 is regarded by some researchers as the perfect non-polluting fuel source. China's first lunar orbiter could blast off as early as 2007, coinciding with its third manned space trip in which possibly three men would orbit Earth in Shenzhou VII and conduct a space walk."
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals