Crime scene DNA test results in minutes rather than weeks or months. It’s a new technology now in the hands of investigators at the King County Sheriff’s Office. It’s called the Rapid DNA machine.

After testing seven different popcorn makers, I found the best one for each type, whether you want a stovetop model or an air popper.

Programming efficient asynchronous systems is challenging because it can often be hard to express the design declaratively, or to defend against interleaving-dependent bugs such as data races and ...