"The guy" is a well known astrophysicist (astrophysicists frequently refer to anything othe than Hydrogen and Helium as "metals"). his article starts out sayin

"The guy" is a well known astrophysicist (astrophysicists frequently refer to anything othe than Hydrogen and Helium as "metals"). his article starts out saying early supernovas (very, very early) would be required and the stars would need to be enormous. He cites various estimates of the early universe to support this.