Originally posted by Power Cosmic II
In terms of tech/scienceGalactus' ship Tea II (which he built) is bigger than a solar system. Dr. Doom stated he could conquer entire galaxies with just one piece of non descript tech in Taa II
He has a room dedicated to just sound. He has tech that recorded the "noise" produced by the big bang.
Galactus' tech (not Doom's) allowed Doom to usurp the powers of pre retcon beyonder
G's tech is beyond Reed and Thanos' understanding
Galactus had something to do with the ultimate nullifier's existence
He created Tyrant from scratch
His smaller ship was able to outrun the power of the IG for a bit
Etc
Even before he became Galactus, Galan was one of the foremost scientists in the "most advanced civilization in the universe"
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Galactus tops them all...