Russia đˇđē @Russia
#OTD in 1849, one of the all-time great Russian scholars Ivan #Pavlov was born. đ It was he who discovered involuntary reflex and laid basis for huge part of modern physiology. The breakthrough was achieved when he noticed that dogs salivate seeing person who feeds them. https://t.co/0XUr6ikjUD — PolitiTweet.org