What Gets Featured on Blue Highway Signs?

What happens when your immune system attacks the point of communication between your nerves and muscles? That's an autoimmune condition called myasthenia gravis, and it leads to muscle weakness that starts around the eyes and can progress to the face, neck, and limbs. Learn about ...  Show more

The asteroid belt between Mars and Jupiter is made up of sparse, tiny bodies of rock, ice, and metal that give us a window into our solar system's early days. Learn how Jupiter helped form the astroid belt and how asteroids might've given Earth its water (and life!) in today's ep ...  Show more

In the US those ubiquitous blue highway signs that tell you which direction you’ll find a Burger King have an interesting backstory. See omnystudio.com/listener for privacy information. 

Icons and symbols and signage are all around us, and nowhere more so than on the open road. So for this episode of Ubiquitous Icons: hop in the car with Roman and Kurt for a crash course in roadside signage. We'll learn about the history of the stop sign, the iconic rural mail ...

The history of traffic signals is way more interesting than you might think. Trust us. 

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I want you to conjure an image in your mind of the white stripes that divide the lanes of traffic going the same direction on a major highway. How long are the stripes and the spaces between them? You can … <a href="http://99percentinvisible.prx.org/2012/12/12/99-invisible-68- ...