It was thought that Aedes aegypti could not survive in the Mountain West. But now, a population is thriving in Colorado.

State health officials appear to have deviated from the usual response during an outbreak after it killed two infants.

Regulations make it hard to introduce organisms that quash invasive species. Some experts see missed opportunities.

Jeffrey Kluger's "Gemini" argues that the program was more milestone than stepping stone in the 1960s space race.