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Can You Solve This Tricky Riddle?

Ready for a little weekend fun? The following riddle has been making the rounds online, confounding people around the world. Now it’s your turn. Here’s the  

Watch a Raindrop Hitting Sand in Slo-Mo

Here’s something you don’t see every day, the slow-motion impact of raindrops on sand. The high-speed photography reveals the detailed liquid-drop impact dynamics  
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