Complex sentence: Hawass denied all involvement, accusing Osmanagić of spreading falsehoods; in his letter he noted that Barakat had no archaeological knowledge or standing, and that Osmanagić was wrong to claim that the Mayan civilization of Mesoamerica originated in Atlantis or the Pleiades constellation.
Split into simpler sentences: Hawass denied all involvement, accusing Osmanagić of spreading falsehoods; in his letter he noted that Barakat had no archaeological knowledge or standing. He further noted that Osmanagić was totally wrong to claim that the Mayan civilization of Mesoamerica originated in Atlantis or the Pleiades constellation.