Are the evo’s ready to concede?
What I have been saying right along:
Sweeping gene survey reveals new facets of evolution
It is textbook biology, for example, that species with large, far-flung populations—think ants, rats, humans—will become more genetically diverse over time.
But is that true?
“The answer is no,” said Stoeckle, lead author of the study, published in the journal Human Evolution.
For the planet’s 7.6 billion people, 500 million house sparrows, or 100,000 sandpipers, genetic diversity “is about the same,” he told AFP.
The study’s most startling result, perhaps, is that nine out of 10 species on Earth today, including humans, came into being 100,000 to 200,000 years ago.
“This conclusion is very surprising, and I fought against it as hard as I could,” Thaler told AFP.
That reaction is understandable: How does one explain the fact that 90 percent of animal life, genetically speaking, is roughly the same age? ( we know the answer here at CAF)
In analysing the barcodes across 100,000 species, the researchers found a telltale sign showing that almost all the animals emerged about the same time as humans.
And yet—another unexpected finding from the study—species have very clear genetic boundaries, and there’s nothing much in between.
“If individuals are stars, then species are galaxies,” said Thaler. “They are compact clusters in the vastness of empty sequence space.”
The absence of “in-between” species is something that also perplexed Darwin, he said.
phys.org
Sweeping gene survey reveals new facets of evolution
Who would have suspected that a handheld genetic test used to unmask sushi bars pawning off tilapia for tuna could deliver deep insights into evolution, including how new species emerge?