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Lecture 2 - The current state of fundamental physics - page 11 / 27

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Ironically, over the past decade cosmologists have come to believe that the cosmological constant may exist.

70% of the matter in the universe appears to be of an unknown form - termed Dark Energy.

Unlike any kind of ordinary matter (or even what cosmologists call dark matter), dark energy causes the expansion of the universe to accelerate.

David Kastor

COSMOS to HUMANITY, Spring 2008

Lecture 2 , slide 11

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