Flight controllers at Nasa working out how to get the crippled Apollo 13 back to Earth.
The creator, who uses the online handle RadialB, says he didn't expect to spawn copycats or be politically provocative. He says his content is intended to be funny - but that he also wants people to believe his fake scenes are real to grab their attention.
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“The tools experts use to make their lives easier are not the tools children should use to learn how to become experts,” Horvath said. “When you use offloading tools that experts use to make their lives easier as a novice, as a student, you don’t learn the skill. You simply learn dependency.”