A brief his­tory of the uni­verse

What ex­actly is space­time?

Sunday Herald - - NEWS -

WELL, it’s pretty dif­fi­cult to un­der­stand even for brainy folk who are re­ally good at hard sums, but put sim­ply space­time is a math­e­mat­i­cal model that joins space and time into a sin­gle idea called a “con­tin­uum”.

Com­bin­ing the idea of space and time helped physi­cists un­der­stand how the uni­verse works on both the big level, such as gal­ax­ies, and small level, such as atoms. The laws of physics now state that time can­not be sep­a­rated from the three di­men­sions of space.

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