Imagine a healthy forest, home to a variety of species: Birds are flitting between tree branches, salamanders are sliding through leaf litter, and wolves are tracking the scent of deer through the understory. Each of these animals has a role in the forest^[1], and most ecologists would argue that losing any one of these species would be bad...

People and institutions are grappling with the consequences of AI-written text^[1]. Teachers want to know whether students’ work reflects their own understanding; consumers want to know whether an advertisement was written by a human or a machine.

Writing rules to govern the use of AI-generated content^[2] is relatively easy. Enforcing them...

A group of college students braved the frigid New England weather on Dec. 13, 2025, to attend a late afternoon review session at Brown University in Providence, Rhode Island. Eleven of those students were struck by gunfire^[1] when a shooter entered the lecture hall. Two didn’t survive.

Shortly after, a petition^[2] circulated calling for...