Is Evolution’s ‘Molecular Clock’ Broken?

A study suggests evolution speeds up in bursts.

View in Browser  DIGITAL ISSUES GEAR REVIEWS SUBSCRIBE Scientists Think We May Have the Evolutionary Timeline All Wrong A new study theorizes that evolution ticks at different speeds, especially when a big group of organisms first appears. Read More Amateur Archaeologists Found 1,100-Year-Old Remains of Three Warriors with a Mysterious Connection There was likely a familial relation between two of the fallen warriors—father and son—but the third body's tie to the two was more unclear. Read More Two New Quantum Experiments Just Proved Einstein Wrong Albert Einstein was right about a shocking among of things, but not necessarily everything. Read More Scientists Found an Untapped Energy Source Running Through Our Cells Flexoelectricity, which can transform mechanical deformation into electrical signals, could provide enough power to fire neurons. Read More This Strange Addiction Fuels Murder and War—But You Can Train Your Brain to Fight It, Research Suggests Breaking the cycle can be sweet. Read More A Passenger Jet Dropped 10 Stories in 7 Seconds. Space Particles May Be to Blame. High-energy cosmic rays errors possibly created a soft error, known as a "bit flip," in the onboard avionics of the Airbus 320. Read More Need Assistance? Contact Us. Follow Us Unsubscribe | Manage Preferences | Privacy Notice | CA Notice at Collection Popular Mechanics is a publication of Hearst Magazines. ©2026 Hearst Magazine Media, Inc. All Rights Reserved. This email was sent by Hearst Magazines, 300 West 57th Street, New York, NY 10019-3779