There are few physical challenges more uncomfortable than holding your breath underwater as long as you can.
But if your duty is to pull downed military personnel from waters all over the world, you need to prove your ability to perform in the most hostile and unforgiving conditions. That’s why the Air Force has long made breath holds part of its training p ... Show More
Jul 15
The sunscreen episode
As consumers, we’re looking for a lot in our sunscreen. Not only do we want it to protect us from sunburns and skin cancer, we also want it to be invisible, lightweight, waterproof, nontoxic, shelf-stable, and cheap. Can we have it all in one product? Sometimes, the answer might ... Show More
32m 41s