Contrary to popular belief, the Great Wall of China is a thin structure that blends in well with the surrounding landscape, making it very hard to spot.
Asked by: Chris Tuttle, Edinburgh
No. Even from low Earth orbit the Great Wall of China is extremely hard to spot with the naked eye. It’s a very thin line, almost the same colour as the landscape. Lots of other things are visible though, including cities, airports and dams. From the Moon, no man-made structure is visible.
Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.
Luis trained as a zoologist, but now works as a science and technology educator. In his spare time he builds 3D-printed robots, in the hope that he will be spared when the revolution inevitably comes.
Subscribe and try your first 3 issues for just £5. After your introductory period you will pay just £22.99 every 6 issues by Direct Debit. Receive every issue delivered direct to your door with FREE UK delivery.
Discover our latest special editions covering a range of fascinating topics from the latest scientific discoveries to the big ideas explained.
Listen to some of the brightest names in science and technology talk about the ideas and breakthroughs shaping our world.
By entering your details, you are agreeing to our terms and conditions and privacy policy. You can unsubscribe at any time.