42
There is a lot of confusion and controversy surrounding the invention of the microscope. If Zacharias Janssen invented the compound microscope on the claimed dates between 1590 and 1618 (most commonly given dates of 1590 and 1595), Janssen could have been a child, or not even born yet, as his birth date has been given as 1580, 1585, and 1588. Janssen was a one time neighbor to Hans Lippershey, another inventor laying claim to the microscope. Testimonies offered from various family and friends have also been inconsistent, so the actual inventor, date, and other details surrounding the microscope are impossible to know for fact. Janssen was a known counterfeiter and fraud on other matters, so it is possible he did not invent the microscope at all.
2007 - 1580 = 427
Jan Janssen is 71 years old (birthdate: May 19, 1940).
Casey Janssen is 29 years old (birthdate: September 17, 1981).
Ruud Janssen is 57 years old (birthdate: July 29, 1959).
Zacharias Topelius was born on January 14, 1818 and died on March 12, 1898. Zacharias Topelius would have been 80 years old at the time of death or 197 years old today.
Helmut Zacharias was born on January 27, 1920 and died on February 28, 2002. Helmut Zacharias would have been 82 years old at the time of death or 95 years old today.
Zacharias Topelius died on March 12, 1898 at the age of 80.
Helmut Zacharias died on February 28, 2002 at the age of 82.
David Janssen was born on March 27, 1931 and died on February 13, 1980. David Janssen would have been 48 years old at the time of death or 84 years old today.
Cam Janssen is 27 years old (birthdate: April 15, 1984).
Zacharias was not physically unaffected by the visit from the Angel Gabriel. He was struck mute as a sign of disbelief because he questioned the angel's message about his wife Elizabeth conceiving a child in her old age.