Earth formed from material exclusively from the inner solar system, planetary scientists show

When Bella Astrofsky, who's poised to graduate in May with a bachelor's degree in journalism, began digging through 19th-century newspapers, she did not expect to help inform how historians understand the end of Reconstruction in the United States. As co-author of a recently published study—an uncommon role for an undergraduate—Astrofsky helped document how newspapers in the Reconstruction-era South went beyond expressing partisan views to actively inciting violence to support Democratic efforts

Bacteria are a major cause of infections and death in hospital settings, due—in part—to the rising incidence of antibiotic resistance. In the United States, antibiotic-resistant bacteria are involved in more than 2 million infections and cause 23,000 deaths annually. There's a growing need for new options that can both treat infections and limit resistance.

In September 2022, humanity crashed a spacecraft into an asteroid—on purpose. The objective of NASA's Double Asteroid Redirection Test (DART) was to see if we could intentionally modify the orbit of Dimorphos, the small moonlet orbiting the larger asteroid Didymos. According to all accounts, the mission worked spectacularly, but it was a one-way trip, so our ability to see what happened to the binary asteroid system has so far been limited to ground-based telescopes. That wasn't good enough for

In chemical processes for producing pharmaceuticals, catalysts are a core technology that determines production speed and cost. However, until now, there has been a trade-off between "precise but disposable catalysts" and "reusable catalysts." A KAIST research team has developed an eco-friendly catalytic technology that combines these two types, operating solely with light and air. This opens a pathway to producing pharmaceutical ingredients more cheaply and cleanly, with expected reductions in