For those of you who want to argue about the age of the Universe, there is this from Wikipedia:
The age of the universe is defined in physical cosmology as the time elapsed since the Big Bang. The best measurement of the age of the universe, as of 22 March 2013, is 13.798 ± 0.037 billion years (4.354 ± 0.012 × 1017 seconds) within the Lambda-CDM concordance model. The uncertainty of 37 million years has been obtained by the agreement of a number of scientific research projects, such as microwave background radiation measurements by the Planck satellite, the Wilkinson Microwave Anisotropy Probeand other probes. Measurements of the cosmic background radiation give the cooling time of the universe since the Big Bang, and measurements of the expansion rate of the universe can be used to calculate its approximate age by extrapolating backwards in time.
Don't you love the "+/- 0.037 billion years"? Close enough for government work.