If you are looking for a spouse there’s an app for that … and now there’s an algorithm! Really, there’s a formula behind determining the best age to start looking for a partner. According to journalist Brian Christian and cognitive scientist Tom Griffiths, coauthors of "Algorithms to Live By: The Computer Science of Human Decisions," that age is 26. Generally, the rule says that when you need to screen a range of options within a limited period of time, the best time to make