The Bestek unit—like every inverter that sells for less than $100—creates AC power, but in what’s called a “modified” sine wave. Shapiro examined this phenomenon using an oscilloscope.

A lakeside getaway becomes a battleground for couples in this fast, furious and exceptionally fun horror-comedy. By Jeannette Catsoulis Will Ferrell and Reese Witherspoon star in a romantic comedy ...

Short Wave New discoveries, everyday mysteries, and the science behind the headlines — in just under 15 minutes. It's science for everyone, using a lot of creativity and a little humor.