Health Checkup: How to Live 100 Years

A century of life was once a rare thing, but that is changing. Science is slowly unraveling the secrets of the centenarians

Data

Data

Martial Colomb / Getty

World Population Age 80 or Older
1950: 14.5 million
2009: 101.9 million
2050*: 394.7 million

Longest recorded life span in select species
(the figures for the whale and the lion are approximate)

Bowhead Whale: 200 years
Human: 122 years
Pigeon: 35 years
Lion: 30 years
Mouse: 4 years
Fruit fly: 153 days

*Medium-variant projection
Source: U.N. Department of Economic and Social Affairs, 2009

See portraits of centenarians.

Special Report: How to Live 100 Years.

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