Vedi e Poi

Before I travel to Napels, Italy (and I am ready to die) I first have to check out these:

• Do fish sleep? How? If yes, do they collide every now and then when they sleep in the shoal?
• Do birds sleep? How? Sitting on a branch? Do they never fall off there? Do they have special senses for this?
• Why do earthworms rise above the ground when it rains? What's in it for them?
  
• Do cats and dogs see the same colors as homo sapiens? Do they enjoy watching clouds too? Can they be color blind too?
• What senses do trees have? And grass? And corn? And flesh-eating plants?
• Was there a postal system during the crusades from Europe to Jerusalem and back? Or only snail-mail with the speed of the marching troops?
  
• Did the Vikings and ancient Egyptians (before Cleopatra VII) ever met? Or did the Vikings not travel back then; perfectly happy in Scandinavia in their villages and near their coasts?
  
• How long will it take before planet Earth has cooled down? From which % are there no more earthquakes? Why is there no earthquake- or vulcano-energy? Always renewable, right?
  
• Why are there no snakes on the North and South pole? And if we give them a thermo jacket as add-on?
  

P.S. 'See Napels and then die' is a quote from Goethe. In German: 'Neapel sehen und sterben!'. It seems that this proverb was based on an Italian original (here): 'vedi Napoli e poi muori'.