Biologist Joel Duff says,
Young-earth creationists frequently tell their audience that hemoglobin is found in ancient fossils inside blood cells. Their audience might be forgiven if they believe that what is in these fossils is hemoglobin just like what is found in your red blood cells. But they would be wrong. What has been found are the highly modified remains of breakdown products, or “hemoglobin-derived porphyrins,” of what once were large macromolecules. That doesn’t sound as sexy but it is a more accurate description of what has been reported in the scientific literature.
So Duff is issuing a challenge: He wants these YECs (there name is legion for they are many) to stop the deception. He promises to commend those who do change their message, and call out those who keep lying. How many will change their tune?
Watch the video here: Soft Tissue Preservation in Fossils: The Hemoglobin Challenge
The video is lengthy but worth watching. It includes a very good description on exactly what has been found and what has not been found. Keep it handy for the next time a YEC makes this claim.