Louis R wrote:My own take is that the gates are essentially philosophical constructs. A truly deep metaphysics could adapt material objects to local conditions as part of the translation.
According to RFC (via an interview) the more people from one side that inhabits a universe the farther physics swings their way. This indicates that the universes that Sharona and Arcana visit are changed by the visitors, and do not work change on them.
Louis R wrote:On the face of it, that isn't consistent with variant physics.
It all depends on which of the "laws of physics" are changed. It becomes a question of what the laws are different; obviously those governing mental Talents and magical Gifts, and which stay the same. It wouldn't take much change in the laws governing chemistry to kill a person when they wandered into those differing laws.
The failure of Shaylar's and Jathmar's talents indicate they are deep into any change of physics that they will experience; also they are not in distress, indicating their bodies survive despite the change. Therefore chemical interaction is largely unchanged, along with electricity, visible light, and a whole host of other areas the human body depends on just to survive (and stay in one piece). This would define the minimum baseline physics that are the same in every universe so far discovered. Thus the apparent conundrum disappears.
If there is a universe where the baseline physics are different I suspect that any human (arcanan, sharonian, and terran) would sicken as they approach it. They would feel the effects little at first, and increasingly with every universe, similar to the way their Talents failed Shaylar and Jathmar; not all at once, but bit, by bit.
Louis R wrote:I think that it's a pretty safe bet that dragons are magical in and of themselves - and thus there's a hard limit to how far up the chain they can go.
The problem is that they fly, they mass 30-40 _tonnes_ and the largest modern fliers mass <26 _kilograms_. The largest known - or at least thought to be - true fliers are the pterosauria, which top out at <250kg.
Dragons in particular are an interesting point in regards to the changes in physics. There is no reason a forty or sixty ton creature can't live without some kind of "artificial" assistance (whether its mechanical or magical). Also there is no inherent reason that sixty tons can't be made to fly (earth has aircraft even heavier). The question becomes that of flight unassisted by artificial means (magical or mechanical) for sixty ton creatures. The objection raised is one based on that of natural evolution; however dragons did not evolve, they were genetically engineered. with the proper "design" I see no reason why a very large creature, like dragons, couldn't be able to fly. It is simply a question of wing size (and design), versus speed that allows any weight to stay aloft.
Having said that, I do not believe that the possibility of magical assistance for dragons to achieve flight can be dismissed entirely. However, if dragons can not fly without magical assistance, then they can only go so far down the chain to Sharona before they must be left behind. Once that happens Arcana loses all of its advantages in regards to mobility. So for story purposes I suspect that dragons can fly without assistance, allowing Arcana the continued advantages of mobility.
As for controlling dragons, the battle dragons were controlled through touch, while the transports were controlled through a metal rod, which was touched (or slapped) to the appropriate areas. If there are magical controls, or inhibitions those would fail; though those are more likely to be in the more violent battle dragons, which would be all but useless when the magic fails anyways.