Here’s a story that has sex, octopuses, population genetics, and climate change, all at once.
What should catch your eye, after the octopus sex, is the shift that enabled those populations to meet across the vast (currently) frozen mass of ice of the Antarctic: a 2°C increase in temperature relative to the modern day. Just 2°C will cause an ice sheet collapse, dramatic rises in sea level, and an increase in the frequency of extreme weather.
Earth scientists continually emphasize that humanity isn’t inescapably doomed by the coming, inevitable disruptions to the climate. It’s just the opposite. Society still has an extraordinary amount of influence in the matter: The more warming, the worse the impacts. But Earth’s inhabitants should be aware that a 2 C world has extreme effects. It’s all the more reason to avoid any warming above 2 C.
The Earth has been there before. It’s not a world we’d enjoy living on.