Abundant fossil bones, teeth, trackways, and other hard evidence have revealed that Earth was the domain of the dinosaurs for at least 230 million years. But so far, not a single trace of dinosaur ...

Smithsonian Institution, Washington, D.C. The Smithsonian is the world’s largest research and museum complex, with 19 museums and galleries, the National ... head out with a plan.

Overall, real GDP is a better method for expressing long-term national economic performance since it uses constant dollars. Let’s say one country had a nominal GDP of $100 billion in 2014.