No, it's not a hoax. They learned these things from the Sumerians, who learned it from the Annunaki.
What's amazing about this is that the Annunaki supposedly created the double helix to create man (the intertwined snakes) and the modern day inventor of the double helix discovered it while taking LSD. And then there's a hypothesis that the Lion at Giza actually had a Lion's head (based on measurements of the body vs. the head) and was altered by the Egyptians. Also, the weathering on the Lion's body is eerily similar to water erosion, which means the date is before 10,000 years ago. For me what's amazing is the fact that the pryamid sank 6 inches since its creation and the angles of the hole relative to astrology match exactly to 12,500 years ago.