For the first time, the U.S. government’s highway safety agency has approved a company’s request to deploy a self-driving vehicle that doesn’t need to meet the same federal safety standards for cars and trucks driven by humans. The National Highway Traffic Safety Administration granted temporary approval for Silicon Valley robotics company Nuro to run low-speed autonomous delivery vehicles that were designed without any accommodations for human drivers. That means no side and rear-view mirrors, windshield wipers, steering wheels or brake pedals. The vehicles previously were subject to federal standards for low-speed vehicles that travel under 25 miles per hour. Those…

The Research Brief is a short take on interesting academic work. The Big Idea: The tomato’s path from wild plant to household staple is much more complex than researchers have long thought. For many years, scientists believed that humans domesticated the tomato in two major phases. First, native people in South America cultivated blueberry-sized wild tomatoes about 7,000 years ago to breed a plant with a cherry-sized fruit. Later, people in Mesoamerica bred this intermediate group further to form the large cultivated tomatoes that we eat today. But in a recent study, we show that the cherry-sized tomato likely originated…