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Scientists know that the layers they see in sedimentary rock were built up in a certain order, from bottom to top.
When they find a section of rock that has a lot of different strata, they can assume that the bottom-most layer is the oldest and the top-most layer is the Again, this doesn't tell them exactly how old the layers are, but it does give them an idea of the ordered sequence of events that occurred over the history of that geologic formation.
This is just a fancy term for the way rock layers are built up and changed by geologic processes.
In order to do so, they both engaged in researching just what made someone desirable online through a combination of coding, A/B testing and statistical probability.
Part of OKCupid’s appeal is in the compatibility matching.
One of the more popular news stories being shared around the web this week has been the story of how Chris Mc Kinlay, a mathematics Ph D candidate “hacked” OKCupid in order to find love.
Naturally, this inspired both wonder – OMG, nerds can break the code and get laid!
The site uses a specific compatibility algorithm based on comparing the questions answered by two possible matches, how each person hopes the person would respond and what weight they give that question.