** Why does the author use “surprisingly” in the second line?
1 To imply that, before Democritus and Leucippus, all scientists had been liars.
2 To emphasize that the study of mathematics came after the study of physics.
3 To support the idea that before the 19th century no one knew of the property of relative density.
4 To highlight that Democritus and Leucippus promoted a theory of invisible atoms in the 5th century BC.