I was intrigued recently when someone sent me a series of pH๏τos purporting to show the skeletons of giant humans excavated at archaeological sites. Here is an example to the right.
From the detail shown below, you can see that the image of the skull is inconsistent with the rest of the pH๏τo — the inserted segment is flat, and one of the workers at the site even appears to have his foot on the skull:
The pH๏τo shown here turns out to be an altered version of a 1993 pH๏τo from a dinosaur dig by the University of Chicago — see the original here.
From the detail shown below, you can see that the image of the skull is inconsistent with the rest of the pH๏τo — the inserted segment is flat, and one of the workers at the site even appears to have his foot on the skull:
All that said, just because somebody was able to fake some pH๏τos and a bunch of people believed them only proves that somebody can use image-editing software to fake pH๏τos and fool other people. It doesn’t mean that the Bible’s accounts about the Nephilim and other giants aren’t true.
The Bible’s account of the Nephilim appears in Gen. 6:1,2,4 — you can look up Bible texts here. Apparently the Nephilim were hybrids resulting from the marriage of materialized angels and human women. Most likely they were sterile and had no descendants themselves. They would not have survived the global deluge.
The historical account in the Bible does not say how tall the Nephilim were. It does, however, say that the height of the Philistine warrior Goliath was six cubits and a span, which would make him about 2.9 meters or 9 1/2 feet tall — see 1 Sam. 17:4.
This height is not much greater than the heights of some humans recorded in modern times — see this list at Wikipedia of the world’s tallest people.
[Update added 26 Nov. 2013: I’ve recently written a blog entry exploring how large a human could actually get, given the limitations of physics and biology — see “Could Giant Humans Exist?“]
It’s not impossible that fossil remains of pre-flood humans are among those that have been discovered in the past or that might be found in the future. However, you need to keep in mind that human (and animal) remains normally decompose completely without leaving any trace. Also, the flood waters would probably have been unimaginably violent and destructive and could have covered human remains with hundreds of meters of sediments, making them rare and difficult to recover.
One intriguing archaeological discovery was announced by a group that conducted digs very recently on Mount Ararat, where they uncovered a wooden structure high on the mountain that some believe is the ark of preservation built by the patriarch Noah — see “Group Claims New Noah’s Ark Find on Ararat.”