Fill a bowl with water, lay a piece of fabrics over the bowl, one end touching the water and the other end laying down on the table. Due to the capillarity effect the water will follow the fabrics and after a while it will be all wet. From this little experiment we can deduce that water travels, at a speed that depends of the type of fabrics, and has a maximum speed in each type of fabrics. We can even extrapolate that the speed of water in nylon can be something like 1 cm/minute. Silly isn't it? But its apparent speed is dictated by the medium that carries it. That brings my questions related to light. 1. Could it be possible that light has an infinite speed but it is slowed down by the medium where it travels? Isn't there a vacuum permeability in the vacuum of space that would limit its speed? 2. (my favorite option) Is it possible that light doesn't move at all? Like the water in the previous analogy? That it just dissipates and follow the fabrics of space, even empty ones, as water in nylon? That would supply a different explanation of why light slow down in water and speed up when it get out.