Originally a solution to the space problem, skyscrapers have come to symbolise ambition and transcendence. See how much you know about these iconic buildings.

Great architecture combines art and science to create structures of aesthetic appeal and functionality. Test your knowledge of this fascinating subject with these multiple choice questions...

The vastness of space is mind-boggling for most of us, yet we remain fascinated with life beyond our own planet. Test your knowledge of our solar system with these multiple choice questions.

Various scales and charts have been developed to measure everything from the pungency of peppers to the intensity of earthquakes. Test your knowledge of some of them with these multiple choice questions...