Mysterious ‘Doorway’ Photographed On Mars By Rover Curiosity Sets Internet Atwitter

Is that a mysterious doorway to an underground necropolis captured in a photo of the surface of Mars by NASA‘s Curiosity rover?

Uh, probably not.

The grainy, now-viral picture shows what looks like a rectangular opening in the Red Planet’s rocky surface that looks like a portal to the unknown. While scientists were quick to debunk claims of otherworldly architecture, Twitter users had a blast with the picture.

“I left the door open at our secret base on #Mars,” tweeted on user. 

“Oh, hey, look, that’s totally a little doorway for little aliens that totally exist, like, on Mars!” tweeted another.

NASA has released no official statement about the image, perhaps preferring to let earthlings speculate.

The image was captured May 7 by the rover’s Mastcam while it ascended Mount Sharp. While it looks big enough to fly a saucer into, it is really less than a foot tall, according to experts.