What species might dominate the planet if humans go extinct

If humans were to go extinct, the octopus could emerge as Earth’s dominant species due to its intelligence and adaptability.

In a June 23 article, Professor Tim Coulson of Oxford University noted, “Their intelligence is one of the most advanced in the animal kingdom.” Octopuses have around 500 million neurons, many in their arms, enabling them to solve problems and operate independently.

Unlike social animals such as dolphins and crows, octopuses are solitary—an advantage in a post-human world. They thrive in varied environments and can survive outside water briefly, hinting at future land adaptability. Coulson said, “Imagine a world where these tentacled geniuses manipulate tools, build shelters, and even explore land.”

While primates, dolphins, and birds are often seen as intelligent successors, their dependence on social structures might hinder survival. Octopuses’ solitary and adaptive nature positions them as a surprising but plausible contender in a humanless future.

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