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Full Idea
We now know the age of the universe to four significant figures. It is 13.72 billion years old!
Gist of Idea
The universe is precisely 13.72 billion years old
Source
Lawrence M. Krauss (A Universe from Nothing [2012], 05)
Book Ref
Krauss,Lawrence M.: 'A Universe from Nothing' [Simon and Schuster 2012], p.87
A Reaction
It amazes me how many people, especially in philosophy, would be reluctant to accept that this is a know fact. I'm not accepting its certainty, but an assertion like this from a leading figure is good enough for me, and it should be for you.
| 21105 | In 1676 it was discovered that water is teeming with life [Krauss] |
| 21104 | General Relativity: the density of energy and matter determines curvature and gravity [Krauss] |
| 21107 | Uncertainty says that energy can be very high over very short time periods [Krauss] |
| 21106 | Most of the mass of a proton is the energy in virtual particles (rather than the quarks) [Krauss] |
| 21108 | The universe is precisely 13.72 billion years old [Krauss] |
| 21109 | Space itself can expand (and separate its contents) at faster than light speeds [Krauss] |
| 21111 | It seems likely that cosmic inflation is eternal, and this would make a multiverse inevitable [Krauss] |
| 21110 | An understanding of the most basic physics should explain all of the subject's mysteries [Krauss] |
| 21112 | Empty space contains a continual flux of brief virtual particles [Krauss] |