Images Dated 24th November 2009

Illustrations of hot-air balloons, steady with air of equal density, and rising with air inside less

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96168829, Air, Color Image, Density, Digitally Generated, Digitally Generated Image, Experiment, Gas, Hot Air Balloon, Illustration, Moving Up, No People, Physics, Scientific Experiment, Studio Shot, Vertical, White Background, Wind

Illustration of river meander, deposition occurring where water flows with least energy, and erosion

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96168867, Arrow Sign, Arrow Symbol, Color Image, Curve, Deposition, Digitally Generated, Digitally Generated Image, Eroded, Erosion, Flowing Water, Geology, Horizontal, Illustration, Image Sequence, No People, Physical Geography, River, Sequential Series, Studio Shot, White Background

Illustration charting the development of wheeled transport, from dragging, to rolling on logs, and u

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96168870, Arrow Sign, Arrow Symbol, Block, Block Shape, Color Image, Development, Digitally Generated, Digitally Generated Image, Evolution, History, Illustration, Load, Log, No People, Pulling, Rolling, Studio Shot, Traction, Transportation, Vertical, Wheel, White Background