Between variants and vaccine hesitancy, the U.S. may be a long way from vaccinating our way out of the pandemic. Plus, early indicators predict that California’s next wildfire season will be particularly bad. And 3D-printed beetles are helping scientists understand where new insect species come from.
Five years ago, NIH asked researchers to include how the sex of mice affects the outcome of pre-clinical research. One team member discusses what’s changed—and what lies ahead.
Scientists capture unusual video evidence of a fish eating a seaside sparrow’s hatchlings, an example of how climate change is upending ecosystems.