If you’re one of the 63 million Americans who went hiking last year, chances are you’ve found yourself needing to go, with no toilet in sight. Aside from personal inconvenience, why is this such a big ...

In the wee hours of the morning in a lab in Amherst, Massachusetts, geoscience graduate student Rob D’Anjou sat looking over test results, a pot of coffee nearby. He’d been pulling long days to ...