Wondering how many people in the United States have a smartphone? If you poll 20 people on the street, your survey won’t be representative of the entire American population. But if you just want to ...

Most of the analysis in this report is based on telephone interviews conducted June 15-19, 2011 among a national sample of 1,502 adults 18 years of age or older living in the continental United States ...

A hole drilled in Martian rock by the Perseverance rover in its first attempt to collect a sample. Project scientists and engineers are trying to figure out why no material made it into the sample ...

This article discusses reduced sampling and testing of starting materials or components. Different strategies are presented to reduce the workload at the steps from sampling to release. Viewpoints ...