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EntertainmentAlbert Einstein's most expensive watch in history
Most of us know the German astrophysicist Albert Einstein with great contributions to human history such as formula E = MC2 and the discovery of a nuclear bomb.Video: The first watch made with 3D printing technology
Christoph Laimer, a Swiss engineer, successfully built a pocket watch with 3D printing technology.
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Why did the ancient Babylonian civilization perish? Was it because they considered 'that thing' a daily meal?
Just discovered a 72km 'tear in the Earth', the world's second largest country is in fear of a tsunami attack
Top 7 facts about the hottest place in the world, where you can fry eggs at outdoor temperature
The Qing Dynasty collapsed, what surname did 20,000 royal descendants change to to integrate into the new era?
After 389 days in the Arctic, costing more than $160 million, hundreds of scientists brought back bad news: What was it?
How long does it take to fall in love with someone?
How much silver has ever been discovered in the world?
How does an atomic bomb work?
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