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10 Largest Economies in the World, Ranked by Nominal GDP
money.howstuffworks.com/largest-economies-in-the-world.htm
Often measured by GDP (gross domestic product), the size of an economy is often defined by the total value of all the goods and services produced the borders of a given country. This gives us a nice, round (and often very large) number to stick next to a country's name, which makes it easy to compare to other countries.
What Is the Strongest Military in the World?
science.howstuffworks.com/strongest-military-in-the-world.htm
Military power isn't distributed evenly across the globe. Some countries have huge armies, air forces and navies, while others have little more than some semi-professional militias.
5 Farming Technologies That Changed the World
science.howstuffworks.com/environmental/green-science/5-farming-technologies-changed-world.htm
Farming technologies have allowed the world to be fed, even though most people no longer farm. Only 2 percent of Americans are farmers, versus 90 percent in the 1700s. Which tools and technologies have had the most impact on farming and why?
The Biggest Crab in the World, Plus 8 Enormous Contenders
animals.howstuffworks.com/marine-life/biggest-crab-in-the-world.htm
Known for their long legs, pincers and hard shells, most crustaceans are omnivorous scavengers, although some are predators or vegetarians. Either way, a steady diet can assist certain crab species in growing to incredible sizes.
What Is the Oldest Country in the World? Depends on Your Criteria
history.howstuffworks.com/world-history/oldest-countries-in-the-world.htm
With constantly changing borders and governments, identifying the oldest countries in the world is tricky work.
The Most Dangerous Volcano in the World (and 9 Scary Others)
science.howstuffworks.com/nature/natural-disasters/most-dangerous-volcano-in-the-world.htm
Volcanoes are some of Earth’s most awe-inspiring features — but also among its deadliest. When asking which is the most dangerous volcano in the world, scientists consider not just eruption history but also population density, eruption style and potential global effects.
Buildup to World War II: January 1931-August 1939
history.howstuffworks.com/world-war-ii/buildup-to-world-war-2.htm
This World War II timeline highlights important dates during January 1931 to August 1939. Follow the events of World War II and the German invasion.
What Are the 7 Largest Countries in the World by Area?
science.howstuffworks.com/environmental/earth/geophysics/largest-countries-in-world-by-area.htm
The seven largest countries in the world account for nearly half of the world's land area, but one is far larger than the rest. Do you know what the largest country is?
The 9 Longest Rivers in the World: From the Nile to the Congo
science.howstuffworks.com/environmental/earth/geophysics/9-longest-rivers-in-world.htm
When it comes to rivers, longest doesn't necessarily mean biggest, and length can be difficult to determine, so the top spot will always be debated.
The Hardest Test in the World May Get You Buzzed
people.howstuffworks.com/hardest-test-in-the-world.htm
Some tests check if you did your homework. The hardest test in the world checks if you can rewrite the rules. These exams are brutal, long, and designed to filter only the most prepared minds.