Europe

There are hundreds of rivers on Earth’s surface, moving freshwater from hills and mountains down to larger rivers, lakes, and oceans.

Thanks to the planet’s natural slopes and ridges, falling rain that isn’t absorbed by soil or evaporated also ends up in nearby rivers. This area—where all flowing surface water converges—is called a river basin, drainage basin, or watershed.

The Top 20 Cities for the World’s Ultra-Wealthy

How many millionaires, centimillionaires, and billionaires live in the world’s wealthiest cities?

While such metrics are not all encompassing, these measurements of private wealth do help put the financial health and economic activity of some of the world’s wealthiest cities in perspective.

The Most Innovative Countries in the World 2022

Since 2000, global investment in research and development (R&D) has tripled to $2.4 trillion.