The last natural butterfly on Earth died on Za-0's fifth birthday. They remembered watching it through un-enhanced eyes, its iridescent wings catching the light that still made it through the thickening atmosphere. Their mother had called it a "gift from the past," this lone survivor that had somehow persisted in their climate-controlled biodome. When it finally settled on a synthetic flower and stopped moving, the automated systems had immediately preserved it in a stasis field - anothe...