User blog comment:St0mX/ Natsu & Dragon slayers aging theory discussion v2/@comment-5894890-20150817223645

The other thing about the age theory that I want to point out (other than Natsu being revived), you have wonder the same about Gajeel. He could possibly another creation like Natsu that was revived, or it was just due to the 300+ year old dragons being inside them.