More than 90% of paved roads in the U.S. are made of asphalt, which is constructed with nonrenewable materials such as petroleum^[1]. One way to make paving more sustainable is to recycle old pavement. When roads break down and need repaving, transportation

Have you ever found yourself in a museum’s gallery of human origins, staring at a glass case full of rocks labeled “stone tools,” muttering under your breath, “How do they know it’s not just any old rock?”

At first glance, it might seem

In 1985, contaminated milk in Illinois led to a Salmonella outbreak that infected hundreds of thousands of people^[1] across the United States and caused at least 12 deaths. At the time, it was the largest single outbreak of foodborne illness in the U.S.

When you put your hand out the window of a moving car, you feel a force pushing against you called drag^[1]. This force opposes a moving vehicle, and it’s part of the reason why your car naturally slows to a stop if you take your foot off the gas

If you wanted to check someone’s pulse from across the room, for example to remotely monitor an elderly relative, how could you do it? You might think it’s impossible, because common health-monitoring devices such as fingertip pulse oximeters and

From drones delivering medical supplies to digital assistants performing everyday tasks, AI-powered systems are becoming increasingly embedded in everyday life. The creators of these innovations promise transformative benefits. For some people, mainstream