Discussion of everything related to the Theory of Evolution.
6 posts • Page 1 of 1
As a genuine scientific theory, Evolution can in principle undergo empirical check and be corrected or disproven if facts happen to contradict it.
Thus, if we discover a new species of animal, we can expect to find it close to species that resemble it (biogeography).
We can also expect to find in it DNA like in any other species for they all come from a common ancestor.
If we get to another planet where there are complex lifeforms, we expect to find simpler and simpler fossils of lifeforms as we get deeper in geological layers.
Sometimes, useless structures (I don't know how to translate from French "structures vestigiales") are put forward as a proof of Evolution, but I am cautious about it. It seems to me very hard to say that a structure has no purpose at all. Such a move would look like an argument from ignorance.
To specify a last point, if Evolution happens to be disproven, it will NOT be a proof of creation, for creation is NOT a scientific theory.
Vestigial structures is probably an accurate translation. What about the stumps on a horse's lower legs; what other explanation of them could there be apart from "leftovers" of a horses "fingers" (the picture in the link is not very clear, but I can assure you that if you look at a horse's skeleon, they do exist)
http://www.don-lindsay-archive.org/crea ... eries.html
There was actually an experiment done in my home country that actually showed evolution taking place over a span of about 5 years only. The result was the change in size of the species. It's a very popular example.
There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one from so simple a beginning.....The Origin of Species
Sagittal section of right knee-joint.
Sesamoid bones at the distal end of the first metatarsal bone of the foot.
Latin ossa sesamoideum
In anatomy, a sesamoid bone is a bone embedded within a tendon.
Sesamoid bones are found in locations where a tendon passes over a joint, such as the hand, knee, and foot. Functionally, they act to protect the tendon and to increase its mechanical effect. The presence of the sesamoid bone holds the tendon slightly farther away from the center of the joint and thus increases its moment arm. Sesamoid bones also prevent the tendon from flattening into the joint as tension increases and therefore also maintain a more consistent moment arm through a variety of possible tendon loads. This differs from menisci, which are made of cartilage and rather act to disperse the weight of the body on joints and reduce friction during movement
Is this the
6 posts • Page 1 of 1
Who is online
Users browsing this forum: No registered users and 2 guests