August 29, 2016

WE ARE ALL DESIGNIST NOW:

Lessons from a 28 Year-Long Evolutionary Experiment (Jeffrey Marlow | August 29, 2016, Discover)

Every morning, a scientist walks into a lab in East Lansing, Michigan, grabs a pipette, and mixes two liquids. One is a cloudy brew of E. coli cells, billions of organisms thick; the other is a sterile solution with glucose and essential nutrients. One part A, 99 parts B, and back in the incubator it goes; over the next 24 hours, the cells will double nearly seven times, adapting to the broth in the process.

And so it goes in the lab of Richard Lenski, a Professor of Microbial Ecology at Michigan State University, just as it has for the last 28 years. That's more than 65,000 generations of E. coli, the "lab rat" of microbiology; the associated experiments have generated freezers' worth of samples and burned through enough petri dishes to fill a warehouse.

It started with 12 replicate populations of the same E. coli strain, each allowed to propagate on its own as it adapted to the glucose- and citrate-containing food source. "Is evolution this invariable slow and gradual process?" Lenski recalls wondering as he set up the first agar plates.

...designed and guided by an intelligent being?

Posted by at August 29, 2016 6:43 PM

  

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