Amateur archaeologist Joshua Bushnell, 5, announced Monday that he is certain that the remains of a dinosaur are buried in the Bushnell family backyard. 'I have to dig up the bones to get them to the museum,' Bushnell told his mother, Kathy Bushnell. 'There's a big brontosaurus by the swingset.' Bushnell has asked his mother to buy him a new digging tool that is larger than his plastic Fisher-Price sand shovel. 