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 ...

Ask the publishers to restore access to 500,000+ books. The Internet Archive keeps the record straight by preserving government websites, news publications, historical documents, and more. If you find ...

Smithsonian Institution, Washington, D.C. The Smithsonian is the world’s largest research and museum complex, with 19 museums and galleries, the National Zoological Park, and various research ...

Ask the publishers to restore access to 500,000+ books. The Internet Archive keeps the record straight by preserving government websites, news publications, historical documents, and more. If you find ...

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.