Space-time compression:
- 1500-1840 (best average speed of horse drawn coaches/sailing ships was 10 mph)
- 1850-1930 (steam locomotives averaged 65 mph; steam ships averaged 36 mph)
- 1950s (propeller aircraft 300-400 mph)
- 1960s (jet passenger aircraft 500-700 mph).
These increasing speeds of travel illustrate that in each phase the sense of global space changed; and with a change in the sense of space came a correlative change in the sense of time.
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