Відео

Glad you enjoyed it. This is part of a first year college course aimed at humanities students. Following this we'll be looking at phylogeny, followed by a survey of life and a bit of ecology. I will likely be making more advanced evolution videos in the future.

@LifesLaboratory sounds interesting 😄

That's a good question. I suspect one of the main functions of the dance is to fully display the plumage. It might also be a display of strength and stamina. The colour and condition of the plumage appears to be an indicator of good health and overall fitness. With respect to songs, there is evidence that birds develop regional dialects, almost like accents and slang in humans. We could probably consider the dance as a sort of language. As occurs in language, isolation, random chance and "trend setting influencers" probably have a big impact on how it changes. I have to admit, I need to do some research on this; this is just personal opinion.

​@@LifesLaboratory I appreciate your answer. Recently I found out about the chimp-bonobo story and how two subspecies initially considered almost the same turned out to have a completely different social lives. It's very interesting. Perhaps certain subspecies develop new ways of survival which require advanced social skills, thus the mating ritual is the 'dance (social) selection'.

This is not supported by evidence. If you have evidence to back your claim, please provide it.

The evidence.... The sequence of nucleotide bases that are the instructions for creating each species from a zygote was written by a genius. Randomly changing the nucleotide base sequence will simply destroy the instructions for creating that animal and won't produce some kind of phenotypic transformation towards a new different animal. Randomly changing the nucleotide base sequence will only produce garbage.

@@planetdog1641 Complexity is not "irreducible", I'm afraid. There is no logical reason to assume that complex structures cannot evolve through evolution. No biological structure has been identified that could not have appeared from simpler components through numerous small steps, with the occasional aid of exaption.

​@@planetdog1641 Over 95% 0f animals are invertebrates, i.e. they have no bones, yet the majority of these have muscle. So, muscles are clearly useful in the absence of bone. Soft bodied animals use hydrostatic systems (water compressed by contractile cells) for support. The contractile cells in these animals do the same job as muscle cells, yet are clearly far simpler. There is a similar spectrum of use and complexity for nerve cells and for nervous tissues. Some animals have very simple nerve cells arranged in a simple nerve net with nothing resembling a central nervous system. In some tissues, muscle cells are modified to act as nerve cells! (Both cell types are excitable and can generate electric signals). Bone originally appeared for protection and support and evolved and changed as muscles evolved and changed. Nothing here is irreducible, in fact you have chosen a strong example of the opposite. It appears to me that you have decided what you wish to be true and have maintained this belief by refusing to learn anything about the topic. Ignorance does not constitute evidence, I'm afraid. Cheers.

​@@vesuvandoppelganger "The evidence....The sequence of nucleotide bases that are the instructions for creating each species from a zygote was written by a genius." This is not evidence, this is unsubstantiated opinion. As mentioned in the video, the vast majority of nucleotide substitutions are deleterious. Some substitutions are silent, they have no effect due to the redundancy of the genetic code (there can be as many as six ways to code for the same amino acid). Very rarely, a change may be beneficial. For example, a change to the portion of a gene that codes for the active site of an enzyme will usually shut down the enzyme, but on rare occasions may allow it to bind to new substrates. Gene duplication provides new copies of genes for mutations to work on. Enzymatic changes can absolutely affect phenotype. Changes to master genes coding for transcription factors can bring about larger changes. It's interesting that you state "randomly changing the nucleotide base sequence will only produce garbage." This is indeed usually the case, and it's thought to account for the fact that 98% of the DNA in humans is none coding (so-called "junk DNA"). While mutations may be random, selection (by definition) is not.

The history of dog breeds is well-understood and well-documented. Breeders are still generating new breeds. The different breeds were not "separately created". Dogs and wolves can interbreed, indicating they are the same species. Wolves gave rise to the breeds of dogs we see today through selective breeding (artificial selection).

You can only create new breeds that are new combinations of the original breeds that were created.

​@@vesuvandoppelganger Dog breeds are generated through the selection of desired traits, not by simply crossing breeds. There are a number of good dog breeding sites that present the history of the different breeds. Out of curiosity, which breeds do you think are the "original breeds"?

How can anyone possibly know which breeds were originally created?

@@vesuvandoppelganger I don't know. It was your assertion that some breeds were created de novo (from nothing) and that all others were hybrids. This conflicts entirely with the written history of dog breeds. I was hoping you could flesh out your hypothesis.

The characteristics that define the group (Aves) are shared due to common ancestry. The ancestor, however, evolved from theropod dinosaurs.

​@@LifesLaboratory It is entertaining to listen to folks say that with a straight face and certainty.

I rely on empirical evidence and logic to make tentative conclusions. Evidence should be used to build models. Evidence should not be ignored to maintain pre-determined ideologies. I am not afforded the luxury of certainty. ;) Of course I agree with you that these are all still birds, in fact that was the point of this example. Cheers.

@LifesLaboratory Yet much evidence is ignored/distorted that is the sad part about scientists who beat the evokution drum beat.

@jaysmith6863 Please provide examples of what has been ignored or distorted. Occasional instances of bad science do unfortunately occur, but you seem to be suggesting a conspiracy of some sort.

Thanks for the kind words.

Thanks for watching! You're correct, my statement was oversimplified and did not include some very recent discussions and evidence. There has always been strong disagreement over where snakes came from. Biologists and palaeontologists have argued for a long time over whether they came from marine reptiles or from burrowing reptiles. The mosasaur hypothesis was very popular into the 2000s (based mostly on morphology), but new fossil and molecular evidence could very well overturn this.

That would be an interesting video. Darwin had a very interesting theory that involved heritable acquired changes. It might also be interesting to discuss actual examples of Lamarckian evolution. There are some. Epigenetics for instance. Learned behaviour and language might also be considered examples, as well as some computer viruses. I'm pretty busy now with teaching and getting these videos out for my students, but perhaps when that is done. Cheers.

This is a three part introduction. I have not stated or suggested that artificial selection is evolution. There are well understood mechanisms for macroevolution and the gaining of new genes. Gene duplications are common. Duplicate genes can mutate in different ways and also come under the control of different transcription factors. This will be discussed in later videos. I will have one video devoted entirely to speciation and macroevolution. Cheers.

@LifesLaboratory sorry gene duplication is not goung to take you from bacteria to bat. It's the same gene it may make a protein different but it by no means gains you all the genes you need to get macro evolution. Besides your ignoring the fact that mutations are neutral to HARMFUL at best. You seldom ever get a truly bennifitial mutation that doesn't come at a big cost. Those traits get lost you don't gain them back either. It's why you cant breed a wolf from 2 full blooded chihuahuas. It's evidence evolution is a lie.

I have addressed all of this in the video or in my other replies to you. I can assure you that no one is suggesting bats evolved directly from bacteria in one step. I am at a total loss on how to address your chihuahua question. Why would breeding two of these give you a wolf? Traits are indeed lost.

@LifesLaboratory bingo that's what's happening in speciation. You can never get back to a wolf. Evolution has no mechanism to gain new genes. You see loss and mutations with cause broken and lost genes. So you don't get true Evolution. Nothing will ever change in time like Evolution claims. Not only is there no genetic way for it to occur, natural selection can only select from what's there. It can never cause an organism to gain new genes only loose them. Living fossils is the best your going to get. I hope that helps explain the flaw in Evolution

Again, why would you get back a wolf? Information has indeed been lost, as I discussed. New information can indeed be gained; I have described the mechanism. I'm afraid you have explained nothing. I'm happy to have a conversation, but it cannot consist of you simply presenting opinion with no logic or evidence to back it. Cheers.

Thanks! I really appreciate the comment. Stay tuned!

Our diet has indeed changed greatly. I wouldn't say that all of our crops and domesticated animals are all unhealthy though. Fortunately, humans are opportunists and relatively adaptable omnivores. But yes, it would be a bit of a challenge for most people to replicate our ancestral diet with available food items. We don't eat nearly enough insects either. ;)

@@LifesLaboratory Tnx for replying. Diet is such a strange topic. One would think that we would figure it out by now. We have thousands of phd and scientists, but we still can't decide what we're supposed to eat. One group swears in the all vegan, while the other in all meat diet.

No That's not how breeding works Example - If you wanted a cute small dog width long ears You start width a dog width large ears. Down breed it into a smaller size dog,but preserve the ears Example - Phoenix foxes don't have large ears Day have small heads. Their ears aren't bigger Dan there prehistoric wolf ancestor their head are small compared to their ears

@@iwkaoy8758 Why wouldn't the same, or similar process work with humans too?

@@Nightman-eb8mj Yes, it would work width man but this guy said you Ken start from a dog width no ears. You Kent breed a group of furless dogs into dogs width fur to their legs But you Ken down breed a long fur dog two a smaller dog width fur to its legs You ken preserve the long fur while you down breed it's size.

Yes, you could, but that would be eugenics... which is generally frowned upon. ;) Now that we can treat many disorders, we likely have slowed the rate of natural selection in humans. Sexual selection might be the most prominent selective force at the moment.

@@LifesLaboratory is it possible too breed feathers scales and venom in humans?

Glad to see you are keeping an open mind. ;)

If babies are cute, surely that means fetuses are even cuter. ;)

Thanks, I'm glad you enjoyed.

You're very welcome. Thanks for watching.

Thanks. I appreciate your comment.

There is no shortage of evidence for evolution. I'll address much of this in future videos.

Thanks!

Thanks. This is the first video of a course. There will be new ones up every week.

🤨

The drawing of the angry man was taken from an old website, there is a link under the drawing. The story from the original website is still there, but unfortunately the message board seems to be gone.

It is certainly possible to have a tapeworm and be asymptomatic (other than having proglottids in your stool). But you're right, they can cause a vitamin B12 deficiency. If bad enough, this generally leads to anemia.

Thanks. I have many, many hours of footage that I need to edit and compile. I will eventually get to it... one day. ;)

Hi. I have lectures on the urinary and reproductive systems. They are unlisted (I did them a long time ago and the audio is not great), but you can access them if you search my "Anatomy and Physiology II" playlist. Cheers.

@@LifesLaboratory I just saw them. Thanks. What about immunology?

@@WrestlingRecapped-ye6ud Yes. Have a look in my Microbiology playlist.

@@LifesLaboratory I also respiratory anatomy. Where's the physiology?

Thanks! I have many, many hours of footage that I really need to edit and post. I've been rather lazy, but I will get there eventually. ;)

Thanks, I'll keep the offer in mind. Monetizing the channel is not a priority. I'm a biology prof. and the majority of my videos are simply PowerPoint lectures that I have prepared for my students as study aids. I put them up on UA-cam just in case they are useful to others. I am experienced with Adobe Premier and will likely be making some more shorts soon. Cheers.

@@LifesLaboratory Nice, will looks forward to more of such videos, shorts especially)

Hi. It's an ermine, also known as a short-tailed weasel.

@@LifesLaboratoryお返事ありがとうございます！オコジョ最高ですね😆💕

Thanks!

Thanks!

Glad you enjoyed it. You're very welcome!

I'm a college professor. These are lectures for an online course. Putting them on UA-cam is the most convenient way for my students to view them. I also felt they might be helpful for others.

@@LifesLaboratory Oh I was just curious since you seem to upload irregularly and not get many views. Thanks

​@@professionalshitposter6897 No problem. Thanks for watching!

Thank you! 😃

This little lake is very peaceful and calming in the moonlight. Thanks for commenting!

That's awesome! Thanks so much for posting.

Thanks, it was fun to make.

You're very welcome. Thanks for watching and commenting!

Thanks for the comment. I didn't measure the ice thickness, but it was still very thin and not able to support any weight (my foot easily went through at the shoreline). I would be surprised if the ice was more than a few centimetres thick at the end of this video. We have had a lot of snow this year. At its deepest we had nearly five feet accumulate, with a total of nearly 10 feet of snowfall for the season. The snow has finally started to melt, and I have the camera going to capture the thaw... stay tuned! Measuring the ice thickness is a great idea, I will try to incorporate some measurements into the next video if I can do so safely. Cheers, and thanks for watching!

@@LifesLaboratory thanks for the detailled response, fascinating timelapse