Chris Conway

Ten years after Viagra hit the market, revisiting some of The Times’s reporting on the drug’s first months.

In the Lamar Valley of Yellowstone National Park, an “ecology of fear” keeps elk from a favorite food.

Late last month, the number of inmates formally cleared on the strength of DNA evidence reached 200, a moment that led to the first in-depth analysis of those cases by the Innocence Project.

A new study of bars and bar workers in Dublin adds some concrete numbers to the debate over indoor smoking.

Quick: Paper or plastic? Still not sure? Well, San Francisco has made its choice.