Horseshoe Crab Fossil, 300 Million Years Old, Discovered By 10-Year-Old Bruno Debattista | Antiques & Vintage Collectibles |
Ever brought in something this good for show-and-tell? An unusual rock, which a 10-year-old student presented to his classmates, has turned out to be an incredibly rare, 320 million-year-old fossil of a horseshoe crab's footprints.