That is completely inaccurate. They didn't say anything like "humans have already discovered all of the “major advances” in the sciences".
They said that the big obvious discoveries have been discovered. There's very little in physics now that doesn't require thousands of person hours, millions in equipment and unbelievable amounts of computing resource.
The stuff that could be discovered by someone working alone has pretty much all been done, because we've already thrown millions of person hours at it.
That's not to say there aren't major advances to be made, it's just REALLY HARD.
They said that the big obvious discoveries have been discovered. There's very little in physics now that doesn't require thousands of person hours, millions in equipment and unbelievable amounts of computing resource.
The stuff that could be discovered by someone working alone has pretty much all been done, because we've already thrown millions of person hours at it.
That's not to say there aren't major advances to be made, it's just REALLY HARD.