TV News LIES

Wednesday, Feb 10th

Last update05:20:13 AM GMT

You are here News Science Bacterial Competition In Lab Shows Evolution Never Stops

Bacterial Competition In Lab Shows Evolution Never Stops

microbe evolutionEvolution is relentless process that seems to keep going and going, even when creatures live in a stable, unchanging world.

That's the latest surprise from a unique experiment that's been underway for more than a quarter-century.

Evolution is so important for biology, medicine and a general understanding of our world that scientists want to understand it as fully as possible. That's why, in 1988, biologist took a dozen glass flasks and added identical bacteria to each of them. Those 12 populations have been evolving ever since, letting scientists watch evolution in real time.

Day after day — including holidays and weekends — workers in Lenski's lab at Michigan State University in East Lansing feed and care for the E. coli bacteria. The bacteria eat and divide again and again. The original microbes have produced more than 50,000 generations over the last 25 years.

Random mutations have allowed them to get fitter, meaning they reproduce faster. "In evolutionary biology, fitness is this representation of the ability of an organism to survive and reproduce," says Lenski. He explains that all else being equal, organisms that reproduce more quickly will have an advantage when competing with those that reproduce more slowly.

Early on, Lenski predicted his bacteria would adapt and adapt but eventually hit a wall — that they would reach a peak level of fitness they couldn't improve on.

More...

 


Most Recent Related Stories...


Hundreds of galaxies found hiding behind the Milky Way

Galaxies found behind Milky WayAstronomers in Australia have confirmed the discovery of hundreds of galaxies hidden by the Milky Way...

The end is nearer: 'Doomsday Clock' to change to show destruction is at hand

Doomsday ClockScientists will announce how close humanity is to extinction Tuesday by updating the minute hand on...

Engineer who warned of 1986 Challenger disaster still racked with guilt, three decades on

Engineer still feels guilty over unheeded Challenger warningThe entire nation was stunned into silence watching the Space Shuttle Challenger abruptly blow apart 73...

Stephen Hawking: Human race is in danger, and it's our fault

Steven HawkingScience superstar Stephen Hawking says humanity is inching closer to demise, and we are to blame.The...
 
America's # 1 Enemy
Tee Shirt
& Help Support TvNewsLIES.org!
TVNL Tee Shirt
 
TVNL TOTE BAG
Conserve our Planet
& Help Support TvNewsLIES.org!
 
Get your 9/11 & Media
Deception Dollars
& Help Support TvNewsLIES.org!
 
The Loaded Deck
The First & the Best!
The Media & Bush Admin Exposed!