Dogs are thought to be more intelligent than cats.
Scientists from the Vanderbilt University in the US have claimed that canines have more complex behaviours as they can think and plan. They have 530 million neurons in the cerebral cortex, while cats only have 250 million.
Professor Suzana Herculano-Houzel told fox25boston.com: "I'm 100 per cent a dog person, but, with that disclaimer, our findings mean to me that dogs have the biological capability of doing much more complex and flexible things with their lives than cats can.
"At the least, we now have some biology that people can factor into their discussions about who's smarter, cats or dogs."
A study has found Arnold Schwarzenegger's iconic "I'll be back" from 'The Terminator' is the most quoted movie line ever.
The famous phrase which was said in the 1984 hit sci-fi franchise polled 62 per cent in the movies list, with "Houston, we have a problem" from Apollo 13 claiming second place with 41.
BT TV asked more than 2,000 UK adults and found that most of the movie quotes are from American films although James Bond's iconic "the name's Bond ... James Bond" was placed at number 10.
When it comes to TV, Homer Simpson's catchphrase "doh!" was the most quoted. The list also included Del Boy's "you plonker" and Catherine Tate's "am I bovvered?".
Tony Singh of BT TV told the Daily Star newspaper: "All of us borrow quotes when speaking to friends and family, or when posting on social media."