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← 'A Universe From Nothing' by Lawrence Krauss, AAI 2009

glenister_m's Avatar Jump to comment 4 by glenister_m

I remember having a great AHA moment reading 'A Brief History of Time' where Stephen Hawking explained where all the matter and energy in the universe came from. Basically all that positive energy (matter plus energy) is precisely balanced by the negative energy of the expansion of the universe. ie. The grand total of all the positive and negative energy in the universe is zero.

Understanding a little quantum mechanics helps.

However it does sound a bit like Hitchiker's Guide to the Galaxy - Number of planets finite, size of the universe infinite, therefore population density of the universe zero, so anyone you happen to meet is the figment of a deranged imagination...

Thu, 22 Oct 2009 15:57:00 UTC | #407572