Hellow guys, Welcome to my website, and you are watching Познавательный мультфильм «А ты знаешь?». Великие научные открытия. and this vIdeo is uploaded by ЯКласс at 2023-04-05T08:59:06-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.