"AERODYNAMICS"

I liked the juxtaposition of old and new. The beautiful wooden sailboat using age old aerodynamic sail form to help propel the boat forward (apparently the word was first used in 1837) and the modern turboprop airliner using a aerodynamics over the wing form in conjunction with energy to remain aloft.
Taken from Toronto's Harbourfront looking out over a Lake Ontario with the de Havilland Dash 8 on final approach to Billy
Bishop Toronto City Airport :-)