Uranium enrichment: A chemist explains how the surprisingly common element is processed to power reactors and weapons
Radioactivity is a natural process where some atoms – like uranium, thorium and radium – break down on their own, releasing energy.
Several states, including Colorado, Massachusetts, New Mexico, New York and Pennsylvania, announced this week that they would be breaking with restrictive eligibility policies unveiled last week by the U.S. Food and Drug Administration on the newly approved COVID-19 vaccines for the fall season.