The Phoenicians introduced crucifixion to Rome in the 3rd century BC. Psalm 22 was written by King David 1,000 years before Christ. During the time of David, the method of execution was stoning.
In 1968, building contractors working in a suburb north of Jerusalem accidentally uncovered a Jewish tomb dated to the first century after the death of Christ. Lying in a Jewish ossuary were the skeletal remains of a man in his twenties who had been crucified. The evidence for this was based on the right calcaneum (heel bone) of the individual, pierced by an iron nail 11.5 cms. in length.
See photo of bone (as well as a recreation of the entire foot skeleton for illustration) here...
http://www.religiousstudies.uncc.edu/jdtabor/crossheel.jpg
"An experiment that was the subject of a documentary on the National Geographic Channel's Quest For Truth: The Crucifixion showed that a person can be suspended by the wrists. Nailing the feet to the side of the cross relieves strain on the wrists by placing most of the weight on the lower body...Since in Roman times iron was expensive, the nails were removed from the dead body to cut the costs, which would help to explain why only one has been found, as the back of the nail was bent in such a way that it couldn't be removed." - Wikipedia
"Anatomists, both modern and ancient, have always considered the wrists as part of the hand." - Dr. C. Truman Davis
Remember also the testimony of Thomas when he said...
“Unless I see in His hands the print of the nails, and put my finger into the print of the nails, and put my hand into His side, I will not believe.”
What did Jesus show the disciples to make them believe? Rope burns?
Luke 24:40
When He had said this, He showed them His hands and His feet.
As Paul also testified in that day...
Colossians 2:14
having wiped out the handwriting of requirements that was against us, which was contrary to us. And He has taken it out of the way, having nailed it to the cross.
The "so-called experts" can say what they want in hindsight. The archaeological evidence, as well as the testimony of those that lived in that day, confirmed that nails were indeed employed in crucifixion... at least in Judea.
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Thanks Grey Tower - He did.