These amazing structures seem too detailed, too complex, too intricate, or too big to have been built by people, particularly those made long ago ... the structures that best inspire, mystify ...

Across the world, monumental structures tell stories of human ambition and creativity. Whether it’s the timeless Great Wall of China or the magnificent Taj Mahal, these man-made wonders embody the ...

It’s easiest to understand if you have a model in your hand — cut the strings and the structure falls apart. We’re used to thinking of integrity in terms of compression. Most man-made ...