Does anyone know of any puas which talk about science in their routines?

I would love to know this too.

This is a good question and an interesting area of the community. Most of the community is founded upon real world experience i.e seeing what works then placing theory after to explain why it works (the opposite of the scientific method, well kind of).

By 'science', i am assuming you are wanting to find out what works definitely so you don't waste your time on trying out bullshit, which is fair enough, however it does not really work like this (in my experience), and a lot of game is simply practicing and finding your style, no perfect scientific approach exists.

If we take 'science' more generally as academia, then lots of methods use elements of this. Almost all pua's use body language and voice totality improvement which is almost always based on experts work in that area. Also, a lot of game can be underpinned by evolutionary psychology, this is where the whole idea of value and the alpha male comes from, mystery talks at length about this, influenced by Richard Dawkins and David Buss. And many pua's acknowledge that value is the basis of attraction like Tyler Durdan, who focuses on the right sub communications to display high value/status.

Afc adam likes to quote psychology experiments as backing, but i still get the idea he just likes to do this and he really just gets some inspiration from these.

Well after this ramble what does it boil down to....
Most of the core parts of game are based on principles of evolutionary (loosely), but the community is all about field testing: to see what works, not hard science.