This raven was cheated out of one piece of cheese. So why won't it trade with that man a month later?
Scientists taught nine ravens a simple trade — a crust of bread for a tasty piece of cheese. One trainer played fair. The other ate the cheese himself. Two days later, six out of seven ravens picked the fair trainer. A month later, seven out of nine still chose him first.
Watch on YouTube: https://youtube.com/shorts/HjyhEkkI-r0
Read the full story: https://factsversedaily.blogspot.com/2026/11/ravens-hold-grudge-against-cheaters.html
New mind-blowing facts every day — subscribe to FactsVerse Daily!
