Mark and Toddcast

This week we take a look at inventions that occurred either way earlier, or way later than we all might expect. From crossword puzzles to plywood, we find out the who's and whens of some of history's biggest innovations. In the news: Roseburg's historic ammonium nitrate explosion, the new Burnside Bridge, desalinization using solar energy, and Slurpee assaults. High-five!