Secrets of 1st dinosaurs lie in the Sahara and Amazon rainforest, study suggests

Remains of the very first dinosaurs on Earth may be buried deep beneath the Sahara desert and Amazon rainforest, a new study suggests.

If found, these fossils could trace the history of dinosaurs much further back than 230 million years, the age of the oldest dinosaur bones unearthed to date. Such a discovery would also radically change scientists’ understanding of where — and how — dinosaurs first evolved.