Rats Laugh if You Tickle Them, Study Says | Time
Newsela - Scientists find that "happy" rats laugh when they are tickled
"Giggling" Indicates If Rats Actually Enjoy Being Tickled | IFLScience
Q: Why did the scientist tickle the rat? A: It wasn't just for laughs | CBC Radio
Giggling Rats Provide Insights Into Why Humans Are Ticklish Kids News Article
Do Animals Laugh? Tickle Experiments Suggest They Do
Rats Laugh, but Not Like Humans - Scientific American
Eavesdrop on Ultrasonic Rat Giggles - Scientific American
Crying elephants and giggling rats – animals have feelings, too
Coquitlam Wildlife Control: Can Rats Laugh?
Are millions of rats about to invade UK homes? | Wildlife | The Guardian
Why are scientists tickling rats? :: Understanding Animal Research
Watch these rats play hide and seek | CNN
Giggles and 'joy jumps': rats love games of hide and squeak, scientists find | Animals | The Guardian
Laughter – Did You Know… | A Momma's View
Tickling rats to improve animal — and scientists' — welfare | CBC Radio
rats laughing - Pet Roof Rats
PETA on Twitter: "Did you know that rats giggle when they're tickled?! http://t.co/3oMInyqtua #RatsAreCute http://t.co/t6Yj4ONss9" / Twitter
Rats ARE ticklish but they only 'laugh' when they are in a good mood | Daily Mail Online
Rats get excited, 'giggle' when tickled | Fox News
Year of the Rat: 15 Fascinating Facts About Rats
Laughing Rat - Stock by NickiStock on DeviantArt
Tickling rats for science: Understanding excitability and laughter
Tickling rats to improve animal — and scientists' — welfare | CBC Radio
Disturbing Video Shows Giggling Workers Killing Rats With Sticks
