The space shuttle is the most complicated (in terms of numbers of parts) machine ever built.Actually, it's the thermos bottle: It keeps hot items hot and cold items cold: How does it know? :)
I found this in sports section ANYWAY - most complicated things 4 the following Tennis - tie breaksFootball - Nothing muchOther sports like cricket/baseball/rugby etc - Going the right way (as in...
the siberian king kong knot, it takes even experts around an hour to tie this knot, which uses generally around 200 meters of rope and is used for hanging artificial rocks, big rocks!