Ice tiles should provide science, just take a look at how much today's scientists are learning about our planet from melting glaciers. Maybe early in the game they should not provide any bonus, but at late game (e.g. atomic/modern/information era) they should provide +2, +4 and +6 (or +3, +6 and +9) science as it is very difficult to create cities next to ice. This would make late game more interesting and encourage players to conquer those parts of map. Scott-Rasmussen station is one way to make those parts more interesting, but if you fail to create it then you lost resources and got nothing. This way you would still get some science.