The city of Ecatepec, Mexico, whitewashed nearly 4 miles of a wall along the pope's travel route and gave 50 local graffiti artists a spot to lay-up their best Francis-inspired drawing. Carrie Kahn/NPR hide caption

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Riot police were deployed Wednesday night outside Topo Chico prison in Monterrey, Mexico, where at least 52 people died in rioting and a fire. Francisco Cobos/AFP/Getty Images hide caption

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A lab worker exposes his arm to Aedes aegypti mosquitoes, which transmit Zika virus, during testing in the lab at Roosevelt Hospital in Guatemala City, Guatemala. Saul Martinez/Bloomberg via Getty Images hide caption

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The totoaba is prized for its large bladder. Richard Herrmann/Minden Pictu via Corbis hide caption

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Goats and Soda

Chinese Taste For Fish Bladder Threatens Tiny Porpoise In Mexico

The nets that ensnare the giant totoaba fish also trap and kill the world's smallest and rarest mammal: a porpoise called the vaquita.

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Lourdes Garcia-Navarro performs with the Vila Isabel Samba School during Carnival in Rio de Janeiro. André Vieira for NPR hide caption

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Doctors are about to circumcise an Indonesian baby in Bandung, Indonesia, in 2013. Indonesia authorized medical personnel to perform the procedure in 2010, then revoked the authorization in 2014. Adek Berry/AFP/Getty Images hide caption

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Walter Thompson-Hernandez displays a photograph of his parents, Kerry Thompson and Ellie Hernandez. Thompson-Hernandez identifies as a "blaxican" — another term for Afro-Mexican, the identity soon to be included on the Mexican census for the first time. Walter Thompson-Hernandez hide caption

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A city health worker and a Brazilian soldier point out potential breeding grounds for mosquitoes in the city of Recife. Mario Tama/Getty Images hide caption

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Goats and Soda

Brazilians Have To Learn To Think Like A Mosquito

That's the advice from a biologist as Brazil launches a war on the mosquitoes that are spreading Zika virus.

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Which house does a better job keeping mosquitoes away? In this model set up by health workers to help prevent the spread of Zika, the one on the left appears to have less standing water, which is a magnet for mosquitoes. Rafael Fabres for NPR hide caption

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Goats and Soda

Carnival Gives Brazil Ideas About How To Fight Zika

Dancing mosquitoes, songs and free condoms are part of the events designed to raise Zika consciousness.

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Indigenous people attend the trial of two army officers accused of keeping Mayan Indian women as sex slaves during Guatemala's 36-year civil war. Johan Ordonez/AFP/Getty Images hide caption

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Goats and Soda

Mayan Women Accuse Military Officials Of Holding Them As Sex Slaves

After decades of silence, Mayan Indian women come forward with stories of torture and rape during the Guatemalan civil war.

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A patient suffering from Guillain-Barre syndrome recovers in a hospital ward in San Salvador on Jan. 27. Researchers are trying to determine whether there is a link between the disorder, which can cause weakness and paralysis, and the mosquito-borne Zika virus. Marvin Recinos /AFP/Getty Images hide caption

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A patient at a Rio de Janeiro clinic has a blood sample taken to check for Zika and other viruses. Vanderlei Almeida/AFP/Getty Images hide caption

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