Evolution

Giant Leap Surplus To Requirements Say Evolution Scientists


I must confess that to the best of my knowledge, no scientist used those precise words.  However, the research does indicate that what was previously thought to be a large change is the result of a few small steps.

It appears that, in evolution, small steps can lead to giant leaps.

In a newly published paper, scientists show that the human hip could have evolved from the equivalent bone structure of an ancestral fish in a few steps.

The evolution of the complex, weight-bearing hips of walking animals from the basic hips of fish was a much simpler process than previously thought, according to a new paper.

Tetrapods, four-legged animals, first came to land about 395 million years ago - a significant step, literally and figuratively, and it was made possible by strong hipbones and a connection through the spine via an ilium, features that were not present in the fish ancestors of tetrapods. 


The large majority of non-coding DNA, which is abundant in many living things, may not actually be needed for complex life in at least one carnivorous plant, Utricularia gibba, according to a paper in Nature.

U. gibba,  the carnivorous bladderwort plant, genome is the smallest ever to be sequenced from a complex, multicellular plant. The researchers who sequenced it say that 97 percent of the genome consists of genes — bits of DNA that code for proteins — and small pieces of DNA that control those genes.


We all know about people’s personalities, and anyone with a dog or a cat will also tell you about their temperaments. More surprising, though, is how many others, from octopuses to frogs and even spiders have them. So why behave according to a personality, when flexibility could allow smarter choices?

Well there's a new article "May Atheism Succeed Demographically" that has invoked another variant of social Darwinism, yet again.

Certainly there are many situations in which one might utilize the concept of evolution, in describing a variety of scenarios.  In general, the point may be to demonstrate that something changes over time, usually with the perspective that it may be improving or adapting to some situation, although such a directionality is not a requirement. 

The African clawed frog (Xenopus laevis) and Budgett's frog (Lepidobatrachus laevis) differ in diet and last shared a common ancestor about 110 million years ago but what they were found to have in common could help researchers on the path to prevention of intestinal birth defects. 

Like most tadpoles, Xenopus exist primarily on a diet of algae, and their long, simple digestive tracts are not able to process insects or proteins until they become adult frogs. Budgett's is an aggressive species of frog which is carnivorous – and cannibalistic – in the tadpole stage.


When you read studies about embryogenesis and the cellular and molecular mechanisms used by cells to assemble into layers or clusters of epithelial cells, you often see the fruit fly Drosophila melanogaster as a model.

Stowers Institute for Medical Research Associate Investigator Matt Gibson, Ph.D., uses a different star, Nematostella vectensis, for his lab's paper on embryology.

Tissues comprised of epithelial cells shape the body not only of simple creatures but also of mammals, where they line every body cavity from lung to intestine and form hormone- and milk-secreting glands. Unfortunately these cells have a dark side too - over 80% of human cancers, carcinomas, are of epithelial origin.  


"Yeah well, it's just a theory".
Seven words that make my blood boil.

This same point has been made in every evolution-creation debate there has ever been, and it provokes the same exasperated response from the evolution camp every time.

"Evolution is both a fact AND a theory. You're misunderstanding scientific terminology. What about the theory of gravity; if you don't believe it then you don't just float away!"
There is no question that Darwin's tremendous insight into the mechanisms by which evolution occurred was one of the singularly most significant events in biology.  Similarly with the discovery of DNA and genetics, the processes by which organisms were formed received a similar boost.  So the purpose of this article is not to argue that Darwin or genetics is wrong.  Instead, the point is to suggest that it is necessarily incomplete.  In the same way that Darwin's work was incomplete because he lacked the necessary information about genetics.  The modern evolutionary synthesis is also incomplete, because it fails to extend the issues of natural selection in an organism's development to their co-evolutionary pa

Recently, there was found in Spain a shelled Pre-Cambrian Critter which showed distinct evidence of a gut.  This got me thinking about the distinction between the deuterostomes and protostomes, interest in which was sparked again by the even more recent article from National Geographic: