Alien Prankster T-Shirts

Martians tricking the space rover

"Any idea how long your family might be visiting?"

The aliens froze, gripped by a primal fear. This time there would be no abduction.

Hair Crop Circle

The Adventures of God

'Boy, does this ever shoot holes in the old Big Bang Theory!'

"I trust him - he has a science background."

"Word has it Earthlings have been using some of our people for cruel scientific experiments."

Cosmonaughty

'The trick to scaring surfers is to only show your dorsal fin when you surface next to them...'

'The probability of someone watching you is proportional to the stupidity of your actions.'

Astronomers studying the 26 moons of Uranus...

'The mysteries of hyena laughter deciphered.'

Early Scientific Fraud: Young Thomas Edison Tried to Pass off a Container Filled with Fireflies as an Incandescent Bulb.

I send greetings from the planet OOM!

Wishing Well

'This thing is dangerous! -- invent fire and burn it up!'

We interrupt today's "The Price is Right" episode to bring you breaking news … Weeks ago, the Hubble telescope spotted a rogue planet the size of Venus plummeting through the solar system on a collision course with earth. It turns out it was actually just a prank involving two very bored ISS astronauts and a grapefruit. Breaking News!!!!! Maybe we should send them to Mars after all. One of them seems to have scrawled "Around and around and around and around" all over his space suit, in crayon.

Practical Jokes in the Science Lab. Watch this -- That chair is made of anti-matter.

"Yeah, I've been radio-tagged by scientists, so once a week, out of spite, I do something irrational just to mess up their data..."

Recombinant DNA Lab.

Dr. Frankenstein: 'Heyyyy, What THE...?!'

"Isn't that Hank's mask?"

'But that wasn't a beaker of acid! That was a cup of coffee from the cafeteria!'

A moment with retired entomologist, Norman 'the torch' Walthrop.

Mars Rover's wheels stolen.

"On what planet do you imagine this would be funny?"

'You're so soft today. Did you switch to 2-ply?'

Mars Probe 'insight' - the very last picture...

Armstrong? Why did UPS just deliver a microscope, a robotic arm, a huge incubator, a nucleus extractor and a dozen lab rats? Well it's certainly not so I can replace you with an army of clones programmed to work for free. Well

I must not poop on freshly washed cars!

Alien Magician

"I don't suppose we could discuss this when my Mars isn't in opposition to your Sun?"

Fishermen catches fish.

Mooning Moon