Maybe not so old
I asked the Los Angeles Gerontology Research Group about the report that Cruz Hernandez of El Salvador is the oldest living human at 127 years old. Their reply sheds real doubt on the claim:
This case is highly suspicious. It is almost certainly a mistake. For example, it was claimed that Cruz Hernandez had 13 children, and her oldest, if still living, would have been 90 years old.
Sorry, that doesn't add up. 127-90=37 years. So she had her first child at 37, before having 12 more? Extremely unlikely. In fact, astronomically unlikely: the odds of living to age 120 is about 1 in 10 billion. The odds of reaching 127? About 1 in a trillion. Simply impossible...
Most likely, Cruz Hernandez would be about 110 years old (90+20=110). At the time before adequate birth control, most women began having children around age 18-20.
Of course, we don't have proof that her son really lived to 90, either, or that the woman alive today is the one recorded in the documents. That the most recent documents were only issued in 2005 is also suspicious.
If anyone would like to prove me wrong, please do so. No age claim to older than 122 has ever been verified.