It is a demonstration of how far human engineering ingenuity has reached, to be mimicking natural systems.

BBC: Robotic insect: World's smallest flying robot takes off

Ever since, Chicago has been a laboratory for architectural experimentation, a celebration of engineering ingenuity and the joys of building something really, really tall.

BBC: Chicago��s celluloid city

"The space shuttle is really a testament to American engineering and ingenuity, " he told CNN affiliate KOLD.

CNN: Space shuttle Endeavour's final touchdown