Explanation

• Greenwich is an area in south-east London, England.
• It lies on the south bank of the River Thames in the historic county of Kent.
• It is famous for the Prime Meridian (0° longitude).
• It is used as the reference for Greenwich Mean Time (GMT).
• It is famous for calculating the time for all countries.

The Greenwich meridian, also known as the prime meridian, passes through the following countries:

• England
• France
• Spain
• Algeria
• Mali
• Burkina Faso
• Togo
• Ghana 
• Antarctica

Last verified on 31-03-2026

Explanation

• The Earth’s circumference at the equator is about 40,075 km (24,901 miles).
• Measured through the poles, it is slightly smaller: 40,008 km (24,860 miles).
• The difference is due to the equatorial bulge caused by Earth's rotation.
• Diameter: ~12,756 km (7,926 miles).
• Age of Earth: ~4.453 billion years.

Last verified on 31-03-2026

Explanation

• Norway lies in the Arctic Circle region, where the “Midnight Sun” occurs.
• In places like Tromsø, the sun remains visible at midnight in summer months.
• This phenomenon is due to the tilt of the Earth (23.5°).
• Countries near the Arctic Circle (like Norway, Sweden, Finland) experience long daylight periods in summer.

Last verified on 01-06-2026

Explanation

• Estonia, Latvia, and Lithuania are three countries in Northern Europe.
• These countries lie along the Baltic Sea region.
• They share historical, cultural, and geographical similarities.
• Together, they are known as the Baltic States.

Last verified on 30-05-2026

Explanation

• The Three Sisters are volcanic peaks in the U.S. State of Oregon.
• They are at the boundary of Lane and Deschutes counties.
• The three peaks are the third-, fourth-, and fifth-highest in Oregon.

The Sisters are now known as:

1. South Sister: 10,363 ft (3,158.5 m)
2. Middle Sister: 10,052 ft (3,063.7 m)
3. North Sister: 10,090 ft (3,075.3 m)

Last verified on 29-05-2026