These results hark directly back to the experiments that originally identified Buckminsterfullerene, which mimicked the outer atmospheric chemistry of red giant carbon stars. Harry Kroto, who jointly won a Nobel Prize for this discovery in 1996, is excited by the findings' clarity. 'The spectrum is incredibly convincing,' the Florida State University academic said. 'I thought I would never be as convinced as I am. The fact that the four lines are there, and C70 is there, is just unbelievable. It's a spectacular paper.'"
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals