Number of marriages from online dating sites
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Its detailed study in the last two decades, with major contributions from past and present Members of the Institute, has enabled us to determine the age of the universe to incredible precision: While we know the age of the Sun to about 0. It would not even be true of our Sun without meteoritic dating.
The same physics applies to balloons: The rate of nuclear reactions goes up as the core temperature rises, and the Sun shines more brightly.
It is about 30 percent brighter today than when the Earth was young.