Since some chemicals become increasingly concentrated in animal tissues as they move up the food chain, long-lived, top predators like alligators — which may spend 50 years or more swimming and eating fish in potentially polluted water — are exemplary sentinels of lurking health threats.

“Eventually, there will be a fungal disease that will become very problematic for humans.”

Up close and dead, the wasp is enchanting, a tableaux vivant of the great and terrible beauty of nature.

“Como nicaragüense, tengo el derecho a la protección del estado y la defensa de mis derechos”