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What Are Ingots?
Ingots are blocks of cast metal from which other things are made. You have probably heard of cast iron. Casting is the process by…
Who Founded the Salvation Army?
The Salvation Army was founded in 1865 in London by one-time Methodist circuit-preacher William Booth and his wife Catherine as the East London Christian…
What Is El Capitan and Where Is It?
The national parks of the United States offer some great opportunities for climbers. Yosemite National Park in California features a climbing obstacle that draws…
Are All Humans of the Same Blood Type?
A blood type (also called a blood group) is a classification of blood based on the presence and absence of antibodies and also based…
Why Do Cricketers Need Yo-Yo Tests?
A yo-yo test involves a player shuttling between two cones that are set 20 metres apart on flat ground. He starts on a beep…