What if the aliens come and we just can't communicate? (arstechnica.com)

If the aliens are smart enough to overcome the light-years distance gap between us, I think they will probably find a way to overcome the communication gap too.

Mathematics

I recently read Project Hail Mary. It has one of the best approaches I’ve ever seen.

You mean they won't have a universal translator?

What if aliens come and humans are ideologically suicidal?