Grigori is a Russian mathematician who proved the Poincaré Conjecture and who refused to accept a Fields Medal or the $1 000 000 Clay Prize.

YouTube is currently facing a global outage, with users reporting playback errors on both the website and mobile apps.
When trying to watch videos, users see messages like “Playback error” or “Something went wrong,” while some say the site is slow or not loading at all.
The outage began within the last 30 minutes.