Explanation

The Missouri River is the longest in the United States

It is a river in the Central and Mountain West regions of the United States

Length: Approximately 2,341 miles (3,767 km).

Nicknamed the "Big Muddy" 

Mouth: Joins the Mississippi River north of St. Louis, Missouri.

Explanation

The Brahmaputra River flows through China (Tibet), India, and Bangladesh

Origin: Tibet Autonomous Region, China (as Yarlung Tsangpo).

Flows Through: China (Tibet), India (Arunachal Pradesh, Assam), and Bangladesh.

Names: Yarlung Tsangpo (China), Siang/Dihang (India), Jamuna (Bangladesh).

Explanation

The Mississippi River is nicknamed "The Big Muddy"

It is the second-longest river in North America.

Length: Approximately 2,350 miles (3,766 km).

Explanation

The Egyptian civilization developed along the Nile River in northeastern Africa,

It is one of the world's oldest civilizations, flourishing around 3100 BCE.

Explanation

The Three Gorges Dam, which is the world's largest power station by installed capacity (22,500 MW)

Three Gorges Dam: hydroelectric gravity dam

Location: Yangtze River, Central China

River: Yangtze River (3rd longest in the world).

Operation: Fully operational since 2012.