Joseph L. Goldstein is 71 years old (birthdate: April 18, 1940).
This answer is closed to changes. This is done in rare cases when questions are being vandalized or answers have become debates. E-mail reopen @ answers.com (no spaces) if you would like it to be reopened.
Joseph L. Mankiewicz was born on February 11, 1909 and died on February 5, 1993. Joseph L. Mankiewicz would have been 83 years old at the time of death or 103 years old today.
L. L. Zamenhof was born on December 15, 1859 and died on April 14, 1917. L. L. Zamenhof would have been 57 years old at the time of death or 152 years old today.