Considering the distance in flight from San Francisco to Hong Kong is about 11,121 killometers, or roughly 6,910 miles it's challenging to fathom getting there via built-in human mobility: by walking.
Wikipedia estimates the average walking speed of an individual human to be a little more than 5 kilometers per hour, or about 3.1 miles per hour. So although it's difficult to imagine walking to Hong Kong from San Francisco, putting all geographical challenges aside, it would take and average person about 225 days to walk there, if that person were to walk 10 hours each day.
The flight time from San Francisco to Hong Kong is about 14 hours. Is is possible we are overlooking the fact that we are already engaging in time travel as a species?
The next destination by air is Balikpapan, a city on the eastern coast of Borneo, Indonesia.
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