Comment Language! (Score 2) 311
Memory is not the real issue
Surely one cell is not too controversial. Two... maybe a little. But once you start down this path, think about where it could go:
Day 137: Rats seem to react to their names.
Day 409: Rats react to basic commands ("Go left" or "Go right")
Day 687: Rats are able to respond to simple yes/no questions ("Are you hungry?")
Day 992: Rat named Stickers cheeps one word: "Stop."
I'm not passing any judgement on this research