They were the ones who brought up unanswered scientific problems currently faced in the scientific community.
It wasn't to solve them on the spot, but to discuss them together, to see if they could offer some ideas to other workers outside.
After all, even now, there are many issues, including mathematical theorems, that remain unproved.
This was a routine matter to bring up.
Moreover, many scholars had been keeping questions to themselves just for this moment to discuss them.
Ellen Young was one of the speakers, her topic had already been decided, and she was the last to give her presentation.
But just her sitting here was enough to surprise everyone.
"The countryside is a good place."
Bruno said with a smile, "I'd like to see the place you stay when the time comes, to see what's different from the countryside in our foreign lands."
Of course, there was countryside abroad too. Bruno spent most of his time in his office, rarely venturing out to see the world.