ocr: ROLAND 50 T. BIRD Glen STOOD BY THE Rose PALUXY I RIVER IN TEXAS Trackwaya on an April afternoon in 1938, staring at one of the rarest,most precious sights a dinosaur hunter could ever imagine, wondering what to do. Appreciate the incredible rarity of this treasure: Footprints, more than 107 million years old! Think of all the places you've left footprints behind. If they weren't in fresh concrete, you can bet they't re long gone. The footprints in the Glen Rose Trackway were saved through an unusual combination of events. They were originally made in soft mud, which was soon covered by silt t ...