If spacetime is a single entity, shouldn't it be simply logical that space expands? We know that spacetime is one single entity, there is no space AND time, but just spacetime. As we move towards the future, more time gets 'created', the more we get into the future away from the Big Bang, the more time there is from the Big Bang. Time expands as the future unfolds. So, is it not simply logical and unavoidable that also space must expand, so that the more we move away from the Big Bang there is not just more time but also more space? Expecting otherwise would be destroying the unity of space and time, we should not expect only the time dimension of spacetime to grow and the space dimensions to stay the same, should we?