According to Gates, at least 2 billion people worldwide don't have access to adequate sanitation, with human waste often ... on camera that entered the machine as feces just minutes before.

The biggest hurdle is the difficulty of finding samples of ancient human feces that retains traces of the microorganisms. In Spain, researchers sifting through a site that is thought to have been ...

Sewage is a code word for what?" Sherard asked the teenagers. "Poop!" one student piped up. "Human poop," Sherard said. "Notice I didn't say we get none. I said we get what? Less." Tours like this ...