Something goes awry when Aurelia’s Dad uses his time machine to come back and warn Aurelia about the fact that she’s going to disappear tonight.

P.S. to Jennifer Campbell-Hicks and the Nature editors: The number one is not considered prime, probably because that would cause prime number factorization to not be unique, but since we don’t know the cause of the total number of dads always being prime, we can overlook that issue.
What do you think? Your machine is broken. It’s spitting you out, over and over. You’re coming out in groups so you always add up to a prime number. We had seven. Now it’s eleven.

Variants

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  1. “Prime Time” by Jennifer Campbell-Hicks, in Nature, 22 October 2015.
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Jennifer Campbell-Hicks