Are humans evolving faster or slower?

Move along, nothing to see here!
Posts: 5110
Joined: Fri Oct 18, 2013 9:03 am

Re: Are humans evolving faster or slower?

Post by 7Wannabe5 » Fri Jun 28, 2019 10:40 am

Another important point to keep in mind is that it is commonplace to imagine selection taking place at the level of something like two adult human males running faster or slower to spear down an antelope, but much more selection takes place at the level of gamete, fetal development, survival through infancy. So, for instance, as levels of urbanization rapidly increase, and the average age at first conception for females also increases, sperm that is better able to fertilize aging eggs will be more successful, and if there are any genotype correlations, these will also increase in general population.

Although, of course, it would still take a disaster of enormous proportions to knock any less favored traits out of the pool. For instance, about 2 percent of the human population has red hair, but maybe 4x as many carry the recessive allele, so even if redheads were sexually shunned world-wide at a rate of 90% for 4 generations, and then 90% of the human population died in a plague, and Wales suddenly sink-holed, there would still be plenty left in the population.

Posts: 46
Joined: Wed Feb 13, 2019 11:23 am

Re: Are humans evolving faster or slower?

Post by intellectualpersuit » Thu Jul 04, 2019 6:29 pm

How are human's pets evolving? What are the effects on dogs and cats that live with humans, any ideas?

I want to believe that eventually Snoopy will be a real thing, then Brian from Family Guy, Garfield too, all coexisting with humans.

Posts: 874
Joined: Fri Aug 03, 2012 9:05 pm

Re: Are humans evolving faster or slower?

Post by Kriegsspiel » Mon Jul 15, 2019 6:41 pm

Came across this recently.
Until the last ten years it was widely believed that cultural evolution had taken over from genetic evolution in our species. When farming replaced hunting and gathering, something fundamentally changed in the relationship between us and our surroundings. We no longer had to change genetically to fit our environment. Instead, we could change our environment to make it fit us.

That view has been challenged by a research team led by anthropologist John Hawks. They found that genetic evolution actually speeded up 10,000 years ago, when hunting and gathering gave way to farming. In fact, it speeded up over a hundred-fold. Why? Humans were now adapting not only to slow-changing natural environments but also to faster-changing cultural environments, things like urban living, belief systems, and the State monopoly on violence. Far from slowing down, the pace of genetic change actually had to accelerate
A Paleolithic human 100,000 years ago would have had less in common with you or me than with someone living 100,000 years earlier or even a million years earlier. Human evolution has been logarithmic—the changes over the past 10,000 years exceed those over the previous 100,000 years, which in turn exceed those over the previous million.

Posts: 2126
Joined: Sat Mar 05, 2011 12:43 pm

Re: Are humans evolving faster or slower?

Post by bigato » Mon Jul 15, 2019 6:57 pm

Nice! So the correct answer to the OP from Genetics is “logarithmically faster”.

User avatar
Posts: 442
Joined: Mon Jan 08, 2018 11:36 am
Location: Homeless

Re: Are humans evolving faster or slower?

Post by unemployable » Mon Jul 15, 2019 9:27 pm

bigato wrote:
Mon Jul 15, 2019 6:57 pm
“logarithmically faster”.

User avatar
Posts: 4264
Joined: Wed Nov 23, 2011 12:42 am

Re: Are humans evolving faster or slower?

Post by Ego » Sun Sep 29, 2019 12:56 am

Not exactly evolution, but interesting.... ... 50faed696d

Skeletal records show that for hundreds of thousands of years, people had beautiful skulls: straight teeth, wide jaws, forward faces, large airways. Robert Corruccini, an emeritus anthropology professor at Southern Illinois University, found perfectly straight teeth and wide jaws in children’s skulls from pre-Roman times among Etruscan remains in southern Italy.

Then, about 250 years ago, our faces began to change. “Etruscan kids had to chew once they were getting off breast milk. Babies have remarkably powerful chewing capabilities.”) Just like diabetes and heart disease, malocclusion — the misalignment of jaws and teeth — followed industrialization around the globe.

Post Reply