Although I hesitate to use the word impossible it would appear as though there are limits to what a human being can achieve.
Sprinting a mile in ten seconds; spending a year on Mount Everest without clothes or food; swimming from San Francisco to Sydney … I don’t think we are likely to see these entries [...]

Although I hesitate to use the word “impossible” it would appear as though there are limits to what a human being can achieve.
Sprinting a mile in ten seconds; spending a year on Mount Everest without clothes or food; swimming from San Francisco to Sydney … I don’t think we are likely to see these [...]