Pyramid energy was popularized in the early 1970s, particularly by New Age authors such as Patrick Flanagan (Pyramid Power: The Millennium Science, 1973), Max Toth and Greg Nielsen (Pyramid Power, 1974) and Warren Smith (Secret Forces of the Pyramids, 1975). These works focused on the alleged energies of pyramids in general, not solely the Egyptian pyramids. Toth and Nielsen for example reported experiments where "seeds stored in pyramid replicas germinated sooner and grew higher".[22]