Which species would dominate our planet?

[Still Waters]

In a post-apocalyptic future, what might happen to life if humans left the scene? After all, humans are very likely to disappear long before the sun expands into a red giant and exterminates all living things from the Earth.

Assuming that we don't extinguish all other life as we disappear (an unlikely feat in spite of our unique propensity for driving extinction), history tells us to expect some pretty fundamental changes when humans are no longer the planet's dominant animal species.

So if we were given the chance to peek forward in time at the Earth some 50 million years after our disappearance, what would we find? Which animal or group of animals would "take over" as the dominant species? 

https://www.sciencealert.com/if-humans-were-wiped-out-which-species-would-become-most-dominant

[+Desertrat56]

Cockroaches.

[XenoFish]

Tardigrades.

[spud the mackem]

Ants and Spiders coalition on land .