On Today's Podcast

Listening for the cosmic ‘dark ages,’ from the lunar far side

The LuSEE-Night mission would place a small radio telescope on the far side of the moon to listen for signals of the cosmic "dark ages."

Listen Now
Today's Broadcast

April 24, 2026

The LuSEE-Night mission would place a radio telescope on the far side of the moon to listen for signals of the cosmic “dark ages.” Plus, the design and layout of ancient temples, plazas, and cities provide clues about how societies were governed. And, everyday DNA mutations can help us understand immune function and aging—and even mitigate harm caused by some inherited diseases.

Listen at 2 p.m. ET

Sign Up For Science Friday’s Newsletters!

From sneak peeks of the show to educational resources to events, stay up to speed with all things SciFri.

Read More
Segment

16:37

Redefining the Kilogram

All the scales in the world are calibrated against a 125-year-old chunk of metal in a vault on the outskirts of Paris. Now scientists are looking to redefine the standard of what “kilogram” really means.

Listen