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AI can write essays, diagnose illnesses and even develop software. But there's one thing AI can't seem to get right: Human hands. Ask an AI art program to create a photo of hands, and the results are usually pretty darn weird. Why is this?

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The modern skyscraper is one of the most extraordinary feats of human engineering. These cloud piercers have been built with steel since the beginning of the 20th century, but now some creative builders are starting to think outside the box. What if you made one completely out of wood? Is it possible? The answer is yes, and they are already being built.

During World War II, the island of Britain was under constant attack by the Germans. But the British had an incredible weapon they used to retaliate: The Spitfire. This iconic plane could climb to high altitudes quickly, outpace the German planes and stop many attacks. It couldn't have done this without some mind-blowing engineering. So, how did it work?

The year is 2040 and you've just come into a huge amount of money. You know exactly what you want to do with it: Stay in the first-ever space hotel. You shell out the cash, get on a rocket and arrive at the hotel. You get to your room and open the door. What do you see? Well, it's not your typical hotel room, that's for sure.

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