Researchers in Vermont infected 5,300 American elms with a lethal dose of Dutch elm disease. Those that survive could help them build the most genetically diverse, disease-resistant population yet.
Two executive orders signed Monday afternoon slashed the size of the Utah national monuments revered by tribes and public lands advocates. Grazing, mining, and drilling interests wanted them opened to extraction.
Residents of one First Nations community went door-to-door warning neighbors before fleeing by boat. More than 900 fires continue burning across Canada.
Most of this inland sea is a dry lakebed the size of Ireland, and it has already released 748 million metric tons of CO2. But scientists say there's still time to reverse course.