Question about the New Testament

[lesliedellow]

So, recently, I read that the gospels were not written until over 70 years after the reported death of Jesus. There are some questions I have.

The average life expectancy of a man at 0 BCE/CE was 30 years. According to my timeline, an eyewitness (which are proven to be unreliable) of at least 108 years would have to remember, by heart, exactly, all the events of Jesus' life four times. The main historian that some people cite actually lived during and recorded the Trojan War, which, according to the Iliad, ended in 75 BCE. He would have been 138 years old at Jesus' death, when a man's average life expectancy was 28. So how can we prove through literature that Jesus really did die on a cross in Golgatha? I do not aim to debunk Christianity. It is an honest question.

Nobody knows for sure when the gospels were written, but even the latest dating has the earliest of them being written around AD70, with all four being written by the end of the first century. Furthermore, in the case of people whose life spans we actually know about, sixty or seventy years seems to have been typical. Josephus was 63 when he died, Philo 75 and Tacitus 61.