Things TLs 7-9 would be interesting to see WITHOUT

[thulben]

Originally Posted by Mailanka

Here's one I've been considering for an alien race: the presence of nuclear power, but not nuclear weapons. I'm not sure how plausible that is, though. Any thoughts?

If you're willing to consider "alternative physics", perhaps the nuclear reaction produces the same amount of energy, but over a much longer time. The difference between something that explodes and something that burns is merely the rate of the reaction. I don't, however, know what implications such alternative physics has...