You might recall from high school biology a scientist by the name of Jean-Baptiste Lamarck. He proposed a mechanism of evolution in which organisms pass on traits acquired during their lifetimes to their offspring. The textbook example is a proposed mechanism of giraffe evolution: If a giraffe stretches its neck to reach higher leaves on … Continue reading RealClearScience – End the Hype over Epigenetics & Lamarckian Evolution
Tag: DNA
Epigenetics: The sins of the father
A while back I linked to a BBC story on the discovery that mice could pass on a learned fear of certain smells to their descendants. This is an almost Lamarckian observation, one that may indicate that the long discredited scientific theory of acquired traits being inheritable may have had a glimmer of truth. This … Continue reading Epigenetics: The sins of the father
Talking Neanderthals challenge the origins of speech
I've posted before about how I think that language is very ancient, probably evolving over hundreds of thousands of years, possibly millions. The evidence for this view continues to mount. It now looks like there's stronger evidence that Neanderthals could talk. We humans like to think of ourselves as unique for many reasons, not least … Continue reading Talking Neanderthals challenge the origins of speech
Neanderthals’ Genetic Legacy | HMS
“This suggests that when ancient humans met and mixed with Neanderthals, the two species were at the edge of biological incompatibility,” said Reich, who is also a senior associate member of the Broad Institute and an investigator at the Howard Hughes Medical Institute. Present-day human populations, which can be separated from one another by as … Continue reading Neanderthals’ Genetic Legacy | HMS
Ancient Rome Infanticide Practices Did Not Favor Boys After All, DNA Study Suggests
"Now that we can use DNA to tell whether the babies were male or female, we're starting to revise the commonly held assumptions about infanticide in the Roman world," said Kristina Killgrove, a bioarchaeologist at the University of West Florida, who was not involved in the research. As horrifying as the killing of newborns seems … Continue reading Ancient Rome Infanticide Practices Did Not Favor Boys After All, DNA Study Suggests
Neanderthals and the Dead – NYTimes.com
Early in the 20th century, two brothers discovered a nearly complete Neanderthal skeleton in a pit inside a cave at La Chapelle-aux-Saints, in southwestern France. The discovery raised the possibility that these evolutionary relatives of ours intentionally buried their dead — at least 50,000 years ago, before the arrival of anatomically modern humans in Europe. … Continue reading Neanderthals and the Dead – NYTimes.com
Perspectives on deep time
The universe is roughly 13.8 billions years old. The universe was 66% of its current age by the time the Sun and Earth formed. Life appears to have begun on Earth when it was around 10% of its current age of around 4.5 billion years. The Earth was 85% of its current age before the … Continue reading Perspectives on deep time
David Dobbs mucks up evolution, part I « Why Evolution Is True
At any rate, Dobb’s goal is several fold. First, he wants to claim that the metaphor of the selfish gene is wrong. Second, he wants to show that it’s wrong because new understanding of gene regulation—how genes turn on and off during development—render the selfish gene metaphor passé. Finally, he claims that a new theory, … Continue reading David Dobbs mucks up evolution, part I « Why Evolution Is True
BBC News – ‘Memories’ pass between generations
Experiments showed that a traumatic event could affect the DNA in sperm and alter the brains and behaviour of subsequent generations. A Nature Neuroscience study shows mice trained to avoid a smell passed their aversion on to their "grandchildren". More at BBC News - 'Memories' pass between generations. I saw this yesterday, but was reluctant to link … Continue reading BBC News – ‘Memories’ pass between generations
SelfAwarePatterns 