I ' d be interested to see too ! <| sep |> Crazy ! !! If only I was there . <| sep |> It doesn ' t say the temperature in the article <| sep |> You really should just let it go . <| sep |> When my p ' let was with his female he would prep a nest , so that could be it . The female didn ' t care tough and she went on laying eggs on a bare piece of wood how rude ! . I hope it ' s a phase if he turns into the behaviour of my lovie , then it ' s not and that it will be hormones . May I ask how old Darwin is ? 😊 <| sep |> WIN VIZ ! !! 67 % AUS 30 % SA 3 % Draw . Pretty accurate . Not <| sep |> This is a great idea . Earth ' s fossil fuel stores are a fluke of paleohistory , and wouldn ' t necessarily be available on other planets . For one thing , they represent a tremendous amount of carbon , so the only civilisations with access to fossil fuels are ones that exist in a relatively cool period of their planet ' s climate history . Even without fossil fuels , combustible fuel is damned handy . Raw wood doesn ' t burn hot or clean enough to be very useful , but charcoal and vegetable oils could run steam or diesel engines . As an alternative to springs , rubber bands can store an incredible amount of energy per weight . The downside is that rubber bands wear out quickly if they ' re put under excessive strain , but who knows what sort of rubber compounds the aliens might have ?