Half of what you know is wrong — according to Science
We tend to think of facts like concrete, a solid foundation. They aren’t. Facts are fluid because our knowledge is always growing and expanding.
Facts change
“Facts change all the time. Smoking has gone from doctor-recommended to deadly. We used to think the Earth was the center of the universe and that Pluto was a planet. For decades we were convinced that the brontosaurus was a real dinosaur.”
The Half-Life of Facts: Why Everything We Know Has an Expiration Date by Samuel Arbesman
Arbesman’s book goes on to talk about how facts have a half-life. Half-life is the time it takes something to decay by half. The Oxford Dictionary says a half-life is the time taken for the radioactivity of a specified isotope to fall to half its original value. For our context, the half-life of facts is the time it takes for half of the facts we know to be updated with better information or proven entirely inaccurate.
It turns out that in some areas, even in the medical field, facts have a half-life of around 45 years. Here’s how Arbesman puts it.
“Furthermore, they got a clear measurement of the half-life of facts in these fields by looking at where the curve crosses 50 percent on this chart: 45 years. Essentially, information is like…
