How The Life Begin

Global structure covers the  geometry and the  topology  of the whole universe—both the observable universe and beyond. While the local geometry does not determine the global geometry completely, it does limit the possibilities, particularly a geometry of a constant curvature. The universe is often taken to be a  geodesic manifold , free of  topological defects ; relaxing either of these complicates the analysis considerably. A global geometry is a local geometry plus a topology. It follows that a topology alone does not give a global geometry: for instance, Euclidean 3-space and  hyperbolic 3-space  have the same topology but different global geometries. As stated in the introduction, investigations within the study of the global structure of the universe include: Whether the universe is  infinite  or finite in extentWhether the geometry of the global universe is flat, positively curved, or negatively curvedWhether the topology is...

Cause Main article:  Problem of why there is anything at all Gottfried Wilhelm Leibniz  wrote: "Why is there something rather than nothing? The sufficient reason [...] is found in a substance which [...] is a necessary being bearing the reason for its existence within itself." [120]  Philosopher of physics Dean Rickles [121]  has argued that numbers and mathematics (or their underlying laws) may necessarily exist. [122] [123]  Physics may conclude that  time  did not exist before 'Big Bang', but 'started' with the Big Bang and hence there might be no 'beginning', 'before' or potentially 'cause' and instead always existed. [124] [125]  Some also argue that nothing cannot exist or that non-existence might never have been an option. [126] [127] [128] [129]   Quantum fluctuations , or other laws of physics that may have existed at the start of the Big Bang could then create the conditions for matter to occur.