 It could be the fossil of one of the world's oldest dinosaurs, and it's been discovered by a team of Brazilian scientists after heavy rains in the southern state of Rio Grande del Sol. Paleontologists want to know if it's new. Daria Albinger, ABC News. Hi, welcome to Staples. Hi. My son's teacher emailed his back-to-school list. He needs crayons and a comp book for every subject. Okay, no problem. With Staples Hot Deals, you'll find super low prices on hundreds of items for back-to-school.