This new study examined the time at which Neanderthals and modern humans should have diverged
to make the evolutionary rate of the early Neanderthals from Sima de los Huesos similar to those observed in other hominins.
Brazilian YFV strains have diverged
into two subclades, one of which has become the dominant lineage in recent years.
This pair of genetic types also diverged
65,000 years ago from that mainland mitochondrial DNA, according to Macaulay's group.
The new fossils cement Sahelanthropus' position as a hominid that lived shortly after modern humans' evolutionary family diverged
from chimpanzee ancestors, the scientists argue in the April 7 Nature.
The evolutionary precursors of modern apes and people diverged
from ancient monkeys between 29 million and 34.5 million years ago, a new genetic analysis concludes.
Head lice found on people today consist of two lineages that diverged
about 1.18 million years ago, say biologist David L.
Skeletal development may have diverged
in various ways for small and large individuals, contributing to the population's anatomical diversity, Potts theorizes.
It should have come as no surprise that the rat's DNA had "changed much more than the human genome had since the two species diverged
from a common ancestor" ("Devil's Lapdog Gets Its Due: The lab rat bares its DNA to biologists," SN: 4/3/04, p.
When scientists unveiled the mouse genome last year, they suggested that the rodent's DNA had changed much more than the human genome had since the two species diverged
from a common ancestor (SN: 2/22/03, p.
That means that certain lineages diverged
at least 95 million years ago, when Africa and South America split.
Recently, though, evolutionary biologists have been looking for examples of species that diverged
with no geographical boost (SN: 7/21/01, p.
19 Current Biology that body lice diverged
from head lice about 72,000 years ago, give or take 42,000 years.
The researchers study Astyanax mexicanus, a freshwater fish that has diverged
into a sighted, surface-dwelling form and a blind, cave-dwelling form.
He examines who our closest living relatives are and when we diverged
from them along our evolutionary path.
Living chimps have diverged
genetically from that common ancestor about as far as people have, the researchers add.