Earth's 'oldest' impact crater is much younger than previously thought, new study finds

A large impact crater in Arizona looks like a bulge in a dusty landscape.

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights.

Ever been late because you misread a clock? Sometimes, the "clocks" geologists use to date events can also be misread. Unravelling Earth’s 4.5-billion-year history with rocks is tricky business.