A couple people ate some hamburger in London yesterday. Not generally noteworthy, except that the burger cost $330,000 to produce and the meat was grown in a lab, not a cow. It was flavored with salt, breadcrumbs, and egg powder; red beet juice and saffron gave the cells a meatier hue. It's the first in-vitro burger ever created (though some artistic antecedents exist).
Cattle stem cells were cultured on scaffolding, which is required to give the meat something like the texture we're used to in our animal proteins. This is an immensely difficult and expensive task, as biologist Christina Agapakis pointed out last year. Nonetheless, the burger marks a major milestone for Mark Post, a biologist at the University of Maastricht, who has been working in this area of tissue engineering for many years.
Ever since I started following in-vitro meat at Wired six years ago, I've noticed a trend. Each time there's a media moment about test tube burgers, dozens of writers discover the existence of this corner of science and get an expert make a prediction about "when we'll see this kind of meat on supermarket shelves," or whatever.
This time around, Reuters got Post to predict commercialization in 20 years, but there have been many other types of forecasts. My intuition was that the predictions were always just far enough into the future to make them checking them unlikely. So I made this chart with some help from my memory, Google News, and Lexis Nexis, so that we can all keep track going forward; the data's embedded below and linked here.