Imaginary Earths (#imaginaryearths) is a series of articles I’ve written exploring what the world might be like if one key aspect of life changed, be it related to the planet or with humanity itself.

• What if Earth had rings?

• What if all humans on Earth had albinism?

• What if Earth had a sibling in a horseshoe orbit?

• What if everyone had photosynthetic skin?

• What if Earth experienced far more cosmic impacts? (The basis for “By the Will of the Gods.”)

• What if temperature determined a baby's sex?

• What if everyone was missing their appendix?