NASA’s roving camera on Mars has discovered another oddity in the 750-mile-wide Jezero Crater, and it has some people wondering if aliens are yanking our chain.

A rock about the size of bowling ball was photographed precariously balanced atop a leaning boulder.

The find was announced just one day after NASA questioned whether “the wind” blew a piece of rocket insulation 1.2 miles away from the Perseverance Rover’s entry point on Mars.

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A photo of the formation was shared June 16 on Facebook, and NASA says it’s in an area named “Hogwallow Flats.” Rocks in the area are believed to be “as old as 3.6 billion years.”

Read more: Miami Herald