Conveying that creativity is in everything we do, not just fine arts. It's hard because it's a preconception.

Understanding what specific cultural shifts are behind the decline in museum attendance and how to counteract them.

"What is consciousness?". The literature actually distinguishes the "hard problem" from the "easy problems".

It's so hard because explaining objectively what is essentially a subjective experience causes people's brains to asplode. (Possibly leaving their minds intact, but who knows?).

And the "easy" problems include the "binding problem". So when that's an example of the "easy" problem, you *know* the "hard problems" are philosophical indulgence really hard.

keeping constant the center frequency of the rabi oscillation from a coherent molecular gas in a mott insulator state to a coherent atomic gas in a mott state. because if the frequency shifts between points, we can't plot a good oscillation cycle. we need control on the tens of Hertz scale, when, if you think about it, the natural frequencies for optical experiments can be thousands of teraHertz.