Gateway Arch

SciTech Now Episode 221

In this episode, a high tech submarine allows for better underwater exploration; an average nose can sense 1,200 flavors; mysterious stains on St. Louis’ Gateway Arch prompt a tricky testing procedure; and the U.S. military is turning to microgrids to keep its power reliable and secure.

Afraid of heights? This is not the job for you.

The iconic St. Louis Gateway Arch, an engineering wonder that towers high above the skyline, is now 50 years old. Discoloration on the stainless steel exterior has building doctors climbing 630 feet up the arch to examine the mysterious stains.