The eight greatest non-human Twitter users

2: Mars Phoenix rover

URL: @MarsPhoenix
Type: Spacecraft
Typical tweet: "I know it LOOKS easy, but you try following instructions sent from 182 million miles away! Next sample goes to microscope, poss Wednesday."

Sadly, adverse conditions on Mars have caused the Mars Phoenix rover to cease tweeting from the red planet's surface. But, up until that point, the rover sent regular updates from Mars (some argued it came from the scientists at NASA's Jet Propulsion Laboratory but, pfft, we know better).

1: Sockington

URL: @sockington
Type: Highly vocal cat
Typical tweet: "DOES THIS FOOD DISH ECHO WHEN I MEOW INTO IT meow meow CONCLUSION NEGATIVE munch munch munch."

Sockington is a cat from America. He tweets regularly (through his owner, Jason, of course) about the day-to-day antics of life as a cat. With over 20,000 followers, he's almost certainly the most popular cat on Twitter.