In mid 2022 dust stretching more than 3,500 miles (5,630 km) and covering more than 2.2 million sq miles (5.7 million sq km) reached Florida, Texas, Mexico, Venezuela and the Caribbean. What was the source of the dust?
The Sahara Desert The Sahara is Earth's largest source of airborne dust. Plumes can travel thousands of kilometres on high-level westward winds. Saharan dust often fertilises the nutrient-poor soils of the Amazon rainforest.
Opened in 1890, with 6 stations over 3.2 miles (5.1 km) and running in a pair of tunnels between the City of London and Stockwell passing under the River Thames, what was the first deep-level underground "tube" railway in the world, and the first major railway to use electric traction?
Which of these is a natural area of roughly 16 square km (6.2 squ miles), which is 5 km (3.1 miles) west of Tuktoyaktuk, Canada, in a coastal region of the Arctic Ocean, which contains approximately 1,350 Arctic ice dome hills?
Which train service, covering 3,726 Km. between Jammu Tawi (Jammu & Kashmir) and Kanyakumari (Tamil Nadu), is the longest passenger train service in India ?
In May 1987, perhaps 4,000 sq. miles (10,000 sq. km) of timber was destroyed in the Greater Khingan, or Da Hinggan, Range in eastern Mongolia. What caused the devastation?
