How scientific is it to observe something in a very localized area and the extrapolate that this observation is true throughout an entire planet or Universe? For instance, if I note that the wind is blowing where I am can I now extrapolate that the wind is blowing everywhere on the planet? Is that scientific? If I note what I consider is expansion occurring around my planet can I then extrapolate from that, that expansion is occurring through out the Universe? Is that scientific?