Zoom and Enhance: The Sound Edition

How could a video camera pick up sound without a microphone? We look at the science of sound and how any object could become a mic.

Listener Mail Roundup #1

How will we consume media in the future? Could we harness the Earth's core for energy? How do astronomers indicate celestial positions? The team answers some listener mail.

Camera One . . . Through One Million

Cameras are everywhere, and surveillance is becoming nearly ubiquitous. Learn more about the future of surveillance in this blog post.

You Got Surveilled

What's the history of the closed circuit television camera? Are cameras actually an effective means of preventing accidents and crime? How can we expect to maintain privacy in a world covered in cameras?