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This is Scientific American's 60-second science. I'm Christopher in Talata. Got a minute?

Parts of the planet warm and cool during El Nino and Leninia,

and infectious diseases also wax and wane in step with that climate cycle.

Take malaria, shown to spike in northern Venezuela during cool laninia conditions,

or flu pandemics, which often follow

months after laninia sets in. Now researchers have linked another public health risk to El Nino

climate cycling, poisonous viper bites. Their study area was Costa Rica, where health centers keep

rigorous records on snake bites. They compared nine years of

those snake bite records, including some 6,500 bytes, to climate data over the same period. And they

found that snake bites were two to three times as prevalent in the hottest and coldest years of the El Nino

climate cycle. Sounds counterintuitive, right? You might expect the climate

extremes to have opposite effects, but the researchers say in hot, dry years, plant productivity

peaks, driving an increase in the number of rodents, aka snake food, and potentially increasing

the number of snakes. And snakes tend to move around more in hot dry weather, increasing chances they'll

encounter and attack an unlucky farmer. In cold wet years, on the other hand, prey numbers plummet,

forcing snakes to travel beyond their usual slithering grounds to eat. Again, increasing

chances of an unlucky meeting. The study is in the journal Science Advances. The researchers

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