Explanation

Explanation

• The world second longest river is Amazon.

Additional information:

• South America: Amazon River – Longest river.
• United States (USA): Mississippi River – Longest river.
• Asia: Yangtze River – Longest river.
• Europe: Volga River – Longest river.

Last verified on 21-07-2026

Explanation

• Country: China
• First use: 806 AD (approx.)
• Early name: Feiqian (Flying Money)
• Dynasty: Tang Dynasty → Song Dynasty (official issue)
• Importance: First-ever paper-based monetary system

Last verified on 11-06-2026

Explanation

• Country: Australia
• Name: Great Barrier Reef
• Location: Coral Sea, off Queensland
• Length: Over 2,300 km (1,400 miles)
• Area: Approximately 344,400 km² (133,000 sq mi)
• The reef consists of around 2,900 individual reefs and 900 islands.
• It is a UNESCO World Heritage Site, inscribed in 1981.

Last verified on 20-07-2026

Explanation

• The Volga River is the longest river in Europe,
• It is with a length of approximately 3,531 km (2,194 miles).
• It flows entirely through Russia and empties into the Caspian Sea.

Additional information:

• Danube – 2,857 km (Flows through 10 countries)
• Ural – 2,428 km (Russia & Kazakhstan)
• Dnieper – 2,201 km (Russia, Belarus & Ukraine)
• Don – 1,950 km (Russia)

Last verified on 20-07-2026