Replete with rare and endangered species, Cuba is a crown jewel of biodiversity in the Caribbean. Science correspondent Miles O'Brien reports on the ways scientists and conservationists are working to survey and protect the island’s rich, and sometimes unique, wildlife…

Tuesday’s earthquake was Mexico’s second in less than two weeks, bringing back memories of the country’s catastrophic 1985 earthquake that killed thousands. What makes the region prone to earthquake damage? Judy Woodruff asks seismologist Lucy Jones to explain the science.

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