Rio de Janeiro's Earth Sciences Museum director Diogenes Campos, right, describes a bone of the dinosaur "Austroposeidon magnificus" to a woman at the Earth Sciences Museum, in Rio de Janeiro, Brazil, Thursday, Oct. 6, 2016. Brazilian scientists say they have discovered the fossil of the largest dinosaur ever found in South America's biggest country. He named the 25-meter-long dinosaur "Austroposeidon magnificus," and said it belonged to the Titanosaur group of herbivores that had large bodies, long necks and tails and relatively small skulls.(AP Photo/Silvia Izquierdo)