I know this is ASB, but suppose certain scientists like Pierre Curie lived longer and didn't die early deaths.
What would WW1 have been like if nukes had been invented?
I think we can assume that it would be invented by either France or Germany, and that it would probably be too heavy to be carried by planes to hit strategic targets.
How do nukes affect the tactics of trench warfare? Would they be planted under enemy lines by sappers? Would the threat of underground nukes lead to a huge push for defensive tunnel warfare, opening up a much larger front under the battlefield?
Could they be dropped by zeppelins on London?
What methods/technologies would be implemented to counter their use?
What would the post war world be like, and what would the attitude toward nukes be?