Largest organisms photosynthetic unicellular and multicellular protists that are related to land plants. The thallus of the unicellular mermaid's wineglass, "Acetabularia", can grow to several inches (perhaps 0.1 to 0.2 m) in length. The fronds of the similarly unicellular, and invasive "Caulerpa taxifolia" can grow up to a foot (0.3 m) long. A member of the order Cetacea, the blue whale ("Balaenoptera musculus"), is thought to be the largest animal ever to have lived. The maximum recorded weight was 190 metric tonnes for a specimen measuring , whereas longer ones, up to , have been recorded but not weighed. The African bush
Return to the Centre of the Earth idea soon after, partly due to Richard Branson's world record attempts to circumnavigate the Earth by hot air balloon and thinking people will relate his music to the event. Soon after, Wakeman came across a newspaper article by Steven Spielberg, "who was talking about have sequels for making films, how you have a story and you spin up from the story for a whole new story, but you have a relationship, which is very comfortable for the people who listen a whole new story, new characters, but there's still a relationship." This prompted the thought in Wakeman's mind, after revisiting