Explanation

• Sifto Salt Mine is located in Goderich, Ontario, Canada.
• They are situated under Lake Huron.
• They are the world's largest underground salt mines.
• It's started operations in 1959.

Additional information:

• The world’s second-largest salt mine is the Khewra Salt Mine in Pakistan.

Last verified on 06-06-2026

Explanation

• Mossad is the national intelligence and secret agency of Israel.
• It is officially known as the Institute for Intelligence and Special Operations.
• Mossad was established on 13 December 1949.
• It plays a key role in intelligence gathering and covert operations.
• Its headquarters is located in Tel Aviv, Israel.

Last verified on 03-06-2026

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