The reason millions of oil barrels are stored in caves — What if a supernova hit Earth?
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The strange history of Clip Art Throughout the '90s and early 2000s, Clip Art was seemingly everywhere. Those little pre-made images were included in practically every program. Why do we not use it much anymore, and how did it become so popular? Tap or click to see the rise and fall of Clip Art. → |
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Why the US stores millions of oil barrels in caves Seventy miles outside of Houston, there is a giant concrete facility. Deep beneath this facility lies a network of caverns filled with oil. This is part of our Strategic Petroleum Reserve. So, how did this plan come to be and how does it play a role in global economics? Tap or click to find out why this oil is so important. → |
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What would happen if a supernova hit Earth? Supernovas are the largest explosions in the universe. They happen when a dying star sheds its outer layer in a moment of extreme energy. If they're so powerful, what would happen if one were to happen close to us? Would we be able to survive? Tap or click to see just how powerful a supernova is. → |
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Why the Ringling Brothers operated a secret spy agency When you think of the Ringling Brothers, you probably think of trapeze artists, fire breathers and tigers jumping through hoops. Spies probably don't come to mind. But in fact, there was a time when the company synonymous with the circus ran its own spy agency. The reason they did it is truly shocking. Tap or click to find out what happened to these spies. → |