This - the exponential, including the special number it gave us, e, constitutes a building block we need to solve pretty much all the problems where the rate of change of something depends on the something.
From then on, something changed between them.
Some communities or individuals take on something new, change a usual tradition, or simplify a piece of their lives instead.
When we change positions on something important, as we did on Afghanistan, we owe our readers an explanation, and I think that a war where American men and women are dying is a classic example.
The subtle change capitalised on something called "social proof" – a principle that says we look to others to inform our own decisions – and led to an increase in sales.
He has shifted to the left on gun control and gay rights over the years and now he is threatening to force through a rules change on filibusters, something he has been reluctant to do in the past.
What concerned him about Senator John Kerry was that on Iraq he "changes positions on something as fundamental as what you believe in your core, in your heart of hearts".
"People were very concerned that what had been the reliable source for what was going on was now changed to something more like Fox News," Margaret Yonco-Haines, a Cold Spring divorce mediator, says.
I know how hard it is to change one's mind on something you're so sure of, something you're convinced the Bible is crystal clear about.
But now I look a little closer, and compare how Fox News, say, and the New York Times change the spin on something," said senior Maggie Galloway, one of the newspaper's opinion editors.
When you change your perspective on something and it feels completely different, then you can change your behavior and your opinions.
