ELi5: Why do so many worms appear on roads, sidewalks, driveways, etc. after it rains?
In: Earth Science
Because the ground becomes saturated with water and worms like to breathe with air.
Basically, they don’t want to drown.
Longer answer:
They breathe through their skin. Their skin needs to be wet for this to occur. The actually can still breathe when submerged. However, oxygen concentrations in water are not the same as in air and different worms use oxygen faster than others. So some need to surface and get air exposure to increase their oxygen intake.
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