Q. After rains, why do worms slither out onto the pavement and “commit suicide?”
A. After a strong rain, the corpses of worms strewn across the pavement are a disgusting sight — or a pathetic one, depending on your sympathy for these slithery invertebrates.
But what’s the advantage of suicide? Teri Balser, an associate professor of soil and ecosystem ecology at UW-Madison, says the answer starts with the fact that worms breathe through their skin.