It was 1938, and the pain of the Great Depression was still very real. Unemployment in the US was around 20%. New machinery was transforming factories and farms, and everyone was worried about jobs. Were the impressive technological achievements that were making life easier for many also destroying jobs and wreaking havoc on the economy? To make sense of it all, Karl T. Compton, the president of MIT from 1930 to 1948 and one of the leading scientists of the day, wrote in the December 1938 issue of this publication about the "Bogey of Technological Unemployment." His essay concisely framed the debate over jobs and technical progress in a way that remains relevant, especially given today's fears over the impact of artificial intelligence.

Amazon unveiled its first wearable on Thursday and it's not what you think. Instead of a cheap smartwatch with Alexa, the Amazon Halo is a minimal wearable with no screen that's designed to keep your body and your relationships healthy. While the Halo connects to your smartphone, you won't be using it to listen to music or get directions. It doesn't have GPS or Wi-Fi or NFC. It has 50-meter water resistance so you can wear it while swimming and 7-day battery life so it can monitor your sleep at night.