Evolution in real time

For those rubes not believing in evolution, don't view this short clip as deeply held beliefs dependent on rather shaky ground from the scientific perspective is a non starter for the ages, kinda like Flat -Earthers not accepting the rather obvious fact earth is a sphere revolving around the sun but we won't go there, for now. :)

The cast members are bacteria. Their set is a large acrylic dish, four feet wide and two across. It is filled with a nutritious agar jelly that contains varying amounts of an antibiotic. The outermost sections are free of the drug—a safe zone in which microbes can easily grow. But as they move towards the dish’s centre, the concentration of antibiotic goes up in 10-fold increments, and conditions become increasingly deadly. To survive in these toxic zones, they need to evolve resistance.

And that’s what they do. At the start of the video, bacteria are dropped into the edges of the dish and soon colonise the outer safe zones. Then they hit their first antibiotic wall, which halts their progress. After a few moments, bright spots appear at this frontier and start spreading outwards. These are resistant bacteria that have picked up mutations that allow them to shrug off the drug. They advance until they hit the next antibiotic zone. Another pause, until even more resistant strains evolve and invade further into the dish. By the end of the movie, even the centre-most stripe—the zone with the highest levels of killer chemicals—is colonized.

Superbugs, it's just the beginning as nature finds a way... always.