YouGov, a British market research firm, polled 8,215 adults in the United States to find out if they ever believed in the “flat Earth” movement. Only 66 percent of young millennials answered that they “always believe the world is round.” Science teachers across the U.S. will be shaking their heads after learning that nine percent of young adults answered that they have “always believed” the planet was flat.

Another nine percent said of young adults said they thought the planet was spherical but had doubts about it. In a disturbing display of indecision, 16 percent of millennials said they weren’t sure what the shape of the planet was.