Take a ride on the Rex Express this week as we find out how the world might work without any trains. Plus... dinosaurs! We'll meet Q-Rex, a young dinosaur with insatiable curiosity, Pops-Dino, his stubborn dad, and Tara Dactyl, the crotchety old flier who keeps all the other beasts in check. If you or your child would like to submit a "What if?" question or tell us about one of Mr. Eric's famous flubs you can do so in the following ways: Leave a voicemail at (205) 605-WHAT Write an email to whatifworldpodcast@gmail.com Tweet at @whatifworldpod  Make sure you're ready with your first name, something you really like or like to do, and your "what if" question. And don't worry if you have to call two or three times. :) Help us out by giving us a rating & review on iTunes! Or, share What If World with your friends on Facebook or Twitter and help us spread the word so that we can continue to tell new stories!