User:Abyssal/Prehistory of South America/DYK/19

• ... that Aerosteon, a 9-metre (30 ft) long bipedal carnivorous dinosaur that lived approximately 84 million years ago, had air-sacs in its bones similar to those in the respiratory systems of modern birds?

• ... that fossils from the Paleocene-age Cerrejón Formation in Colombia are the earliest record of Neotropical rainforests?

• ... that the 200-million-year-old Tachiraptor is a new type of dinosaur discovered in Venezuela?

• ... that the low numbers of injuries in carnivorous dinosaurs indicate they may have been less aggressive with individuals of their own species than modern crocodilians?