"A sky full of air, oceans made of water, and the presence of life are some of the things that set Earth apart from other planets. Learn what else makes Earth unique among the planets in our solar system! Access a downloadable 3D printer model from NASA via Page Plus QR codes. Now in Spanish!"-- "Un cielo lleno de aire, oc©♭anos compuestos por agua y la presencia de vida son algunas de las cosas que diferencian a la Tierra de los dem©Łs planetas....