Vision Involves a Bit of Hearing, Too

New evidence points to the evolution of the ability for bacteria to grab nitrogen from the atmosphere some 3.2 billion years ago, about 1.2 billion years earlier than thought—with implications for finding extraterrestrial life. Lee Billings reports 

A dwarf galaxy near the Milky Way may consist of more dark matter than regular matter.* Clara Moskowitz reports 

The resonant properties of your skull can amplify some frequencies and dampen others—and, in some cases, affect your hearing. Christopher Intagliata reports.  Learn more about your ad choices. Visit megaphone.fm/adchoices 

It’s thought that about 15% of us are affected by tinnitus, and despite its potentially debilitating impact on mental health and quality of life, there isn’t any cure for the condition. Madeleine Finlay speaks to John, who has used CBT techniques to learn to live well with his ti ...  Show more

Have you ever been convinced you heard a voice -- shout, a whisper, someone speaking directly to you -- only to turn around and realize no one was there? This experience is more common than we might comfortably imagine. For millennia, people who heard voices in their heads were c ...  Show more

New research finds they fly around on noise-cancelling wings Learn more about your ad choices. Visit megaphone.fm/adchoices