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This is Scientific American's 60-second science. I'm Christopher in Taliatta.

For male black widow spiders, finding a mate is risky business.

They have to go on an epic journey.

Catherine Scott, an arachnologist at the University of Toronto.

At the population she studies, on Canada's Vancouver Island,

she says the spiders have only a 12% chance of surviving their scramble over sand dunes and plants.

And they have very poor eyesight and they're traveling at night.

So one way males find females is by sniffing, from afar, the pheromone perfume on their webs.

But Scott has now discovered an alternative way males find

mates by subjecting the spiders to a race. For each male, before he started, we weighed him in

on a tiny scale, and we painted him with racing stripes and measured the length of his legs.

We had a finish line of pheromone-emitting females, and we released males at various distances

from those females to see whether they arrived at a female's web or not, and how fast

they got there.

What surprised there was that the males that started farthest, nearly 200 feet away, actually

traveled fastest towards females.

And the reason, they poach the paths of their rivals,

...