As others have said, a large part of it is probably due to 'belief systems' we develop and don't question, so reduced creativity. I think another reason that i

As others have said, a large part of it is probably due to 'belief systems' we develop and don't question, so reduced creativity. I think another reason that is often overlooked in this kind of discussion, is that our society offers much greater incentives for young people to discover something new. If you're at an advanced age, there are way less opportunities to still have the 'leisure' to work on something fundamental, because our expectations are that ppl generally come up with their big idea before the age of about 30. So perhaps it is a self-reinforcing mechanism.