Science

 

In 1920, a Harvard scientist put rats in a maze with two exits. One path was well-lit but electrified. The other was dark but safe. 

The rat tried the bright exit and got shocked. It tried again. It got shocked again, and again, and again. It took 165 painful tries, but it finally learned to take the dark path. 

Fifteen years later and three generations later, the rats needed just 20 tries. They were smart. The solution was passed genetically. That's not supposed to happen. 

A scientist in Scotland tried the same experiment with a completely different set of rats. His rats started at 25 tries, as if they already knew the answer to the puzzle. 

Knowledge had crossed the ocean, and no one could explain how. 

Guess what; Lamarck was right!