Did the Universe Twist Ancient Light? Scientists Test a Strange Cosmic Signal

Did the universe twist its oldest light as it traveled across billions of years? Scientists have developed a new calibration method to test cosmic birefringence and separate genuine cosmic signals from telescope errors.

Using Planck data, the technique strengthens the case for a mysterious rotation that could point to new physics or dark matter.

Thank you for listening to Bedtime Astronomy — your guide to the cosmos. New episodes on space exploration, NASA missions & the latest astronomy breakthroughs.

This episode includes AI-generated content.