The Medea Hypothesis says that sometimes when a species evolves to become too successful, or grows too big or powerful, it can cause its own destruction and go extinct. To use an example, if a species of bug grows so much that there are millions and millions of them, then they might eat all the food around them and use up all the resources, so that none of them can survive. This means that the species of bug would have caused its own extinction. The Medea Hypothesis is named after the character in Greek mythology who killed her own children to punish her husband.