@I_Think:<br />I have heard of pressure theory before. I also think the space is a medium in which all living and non-living materials exist. Analogous to fish in water. We know a fish displaces water, but do we, the matter, displace the space? That is where i get lost. I have no answer to that. <br /><br />@nacnud: <br />If you read my post again, i did say 'now'. After eather theory was dropped, interest in empty space was virtually absent for a long time. Only recently interests in empty space have grown. The space may affect particles in microscopic level not larger level as eather theory was tested. When i hear explantions of uncertainty theory or even unexplicable results of young's double slit experiment, no one even mention whether the empty space has any role in it. Instead some even bring in parallel universe.<br /> <div class="Discussion_UserSignature"> <font size="2" color="#ff0000"><strong>Earth is Boring</strong></font> </div>