WASHINGTON, Jan 23 (Reuters) - Dinosaurs long dominated Earth's land ecosystems with a multitude of forms including plant-eating giants like Argentinosaurus, meat-eating brutes like Tyrannosaurus ...

Plate tectonics had arranged the world's continents into a single massive landmasses: Pangaea. Today I attempt to use my knowledge of geography to create a basic map of what this land might have ...

The overall quant rating is not an average of the factor grades listed. Instead, it gives greater weight to the metrics with the strongest predictive value.