Analysis: Unique fossil record of marine mollusks helps scientists predict extinction risk—before it's too late

Scientists are increasingly worried we may be witnessing the start of the "sixth mass extinction"—the first to be caused by human activities.

Background

Scientists are increasingly worried we may be witnessing the start of the "sixth mass extinction"—the first to be caused by human activities.

What to know

This page summarizes the latest context, related facts, and follow-up reading for this topic.