Avaiation gives Explorers Range 4 - useless

[Thona]

This can be removed. Seriously. Aviation is a tier one tech in the World Wars 2 tech level. This is many many tech levels AFTER most people - or all people - will have uncovered the whole map. Heck, I generally do that latest in the bronze age - and that is mostly because after some restarts stone age is VERY fast.

[Deprecabile]

totally agree. Maybe they can generate some tiles that can be explored only with some tech (very high mountains, lands overseas, ocean depths, ecc). This would also increase the usefulness of searches such as caravels.
Aviation could give a bonus to the transport of resources

[jeldren]

I unlock all WW2 tech before I start to uncover the whole map.