Complex sentence: After his mother died in 1955, he moved to Brazil to buy land and create the super-race, and where he renewed his interest in UFOs, Atlantis, aliens, underground tunnels and the hollow Earth theory.
Split into simpler sentences: After his mother died in 1955, he moved to Brazil to buy land and create a super-race. In Brazil, he renewed his interest in UFOs, Atlantis, aliens, underground tunnels and the hollow earth theory.