ඩාවින්ගේ පරිණාම වාදය | Charles Darwin Evolution | Neth Unlimited History Sri Lanka 123 - 01 

ඔව් බන් . මම තව පොඩ්ඩෙන් ඕකම දානව.👍👌

රාජ් සෝමදේව මහාචාර්යතුමා කියන්නේ මගේ ජීවිතයේ දැකපු නිහතමානීම මහාචාර්යවරයා . සීගිරි චාරිකාව මම ගියේම එතුමාව මුණගැහෙන්න කතා කරන්න තමා ,වචනයෙන් කියා නිම කළ නොහැකි දැනුමක් මහාචාර්යතුමා ළඟ තියෙනවා ,ඒ වගේම ඒ දැනුම අනිත් අයට ලබල දෙන්න බෙදා දෙන්න එතුමා කිසිම විටෙක ලෝභ නැහැ පුදුම නිහතමානි අහන ඕනෑම ප්‍රශ්ණයකට එතුමා මුල ඉදන් අග වෙනකම්ම උත්තර දෙනවා ,මහාචාර්යතුමාගේ ලඟින් හිටගෙන හිටියත් අපිව දැනුමින් පෝෂණය වෙනවා විශ්වවිද්‍යාල කථිකාචාර්යවරුන් ආචාර්යවරුන් මහාචාර්යවරුන් අතරින් මා දැකපු සාමාන්‍ය ජනයා දැනුමින් පෝෂණය කරන්න සැදී පැහැදී සිටින සාමාන්‍ය ජනයාට තේරෙන අතිශය ලස්සන සිංහල භාෂාවෙන් කතා කරන මහාචාර්යතුමා රාජ් සෝමදේව මැතිතුමා තමා ,එතුමාට දීර්ඝායුෂ ප්‍රාර්ථනා කරනවා ,

Matath e uwamanawa tiyanawa

ඇටි බන් අපි බවුද්ද දර්ශනය ගැන කතා නොකරන්නේ..පට්ට ඔෆ්ෆ් ටබල්නේ..

ඔව් අයියේ දැන් අපේ රටේ පණ්ඩිතයෝ විශ්වාස කරන්නේ ඩාවින්ගේ පරිණාමවාදයි විද්‍යාවයි.

@@r.msachinthadulshanyapa2005 එය ඉතා කනගාටුදායක තත්වයක්.

All the best

Welcome

මේක ඔහු මෙහෙයවන ගුවන් විදුලි වැඩසටහනක අතුරුඵලයක්, ඒකට මොකද කරන්නේ, නිවේදකයා නිශ්ශබ්ද කරන්න

Evolution is a fact now

Tks

everal years ago, by looking through a collection of more than 2,000 unidentified bone fragments for signs of human proteins. In a 2016 paper4 , they used radiocarbon dating to determine that the bone belonged to a hominin who lived more than 50,000 years ago (the upper limit of the dat- ing technique; subsequent genetic analysis has put the specimen at around 90,000 years old, according to Pääbo). They then sequenced the specimen’s mitochondrial DNA - the DNA found inside cells’ energy converters - and compared that data to sequences from other ancient humans. This analysis showed that the specimen’s mitochondrial DNA came from a Neanderthal. But that was only half of the picture. Mito- chondrial DNA is inherited from the mother and represents just a single line of inherit- ance, leaving the identity of the father and the individual’s broader ancestry unknown. In the latest study, the team sought to get a clearer understanding of the specimen’s ancestry by sequencing its genome and com- paring the variation in its DNA to that of three other hominins - a Neanderthal and a Den- isovan, both found in Denisova Cave, and a modern-day human from Africa. Around 40% of DNA fragments from the specimen matched Neanderthal DNA - but another 40% matched the Denisovan. By sequencing the sex chromosomes, the researchers also determined that the fragment came from a female, and the thickness of the bone suggested that she was at least 13 years old. With equal amounts of Denisovan and Neanderthal DNA, the specimen seemed to have one parent from each hominin group. But there was another possibility: Denny’s parents could have belonged to a population of Denisovan-Neanderthal hybrids. A FASCINATING GENOME To work out which of these options was more likely, the researchers examined sites in the genome where Neanderthal and Denisovan genetics differ. At each of these locations, they compared fragments of Denny’s DNA to the genomes of the two ancient hominins. In more than 40% of cases, one of the DNA fragments matched the Neanderthal genome, whereas the other matched that of a Denisovan, suggesting that she had acquired one set of chromosomes from a Neanderthal and the other from a Denisovan. That made it clear that Denny was the direct offspring of two distinct humans, says Pääbo. “We’d almost caught these people in the act.” The results convincingly demonstrate that the specimen is indeed a first-generation hybrid, says Kelley Harris, a population geneti- cist at the University of Washington in Seattle. Skoglund agrees: “It’s a really clear-cut case,” he says. “I think it’s going to go into the textbooks right away.” Harris says that sexual encounters between Neanderthals and Denisovans might have been quite common. “The number of pure Deniso- van bones that have been found I can count on one hand,” she says - so the fact that a hybrid has already been discovered suggests that such offspring could have been widespread. This raises another interesting question: if Nean- derthals and Denisovans mated frequently, why did the two hominin populations remain genetically distinct for several hundred-thou- sand years? Harris suggests that Neanderthal- Denisovan offspring could have been infertile or otherwise biologically unfit, preventing the two species from merging. Neanderthal-Denisovan pairings could also have had some advantages, even if there were other costs, says Chris Stringer, a palaeo- anthropologist at the Natural History Museum in London. Neanderthals and Denisovans were less genetically diverse than modern humans, and so interbreeding might have provided a way of “topping up” their genomes with a bit of extra genetic variation, he says. Pääbo agrees that Neanderthals and Denisovans would have readily bred with each other when they met - but he thinks that those encounters were rare. Most Neander- thal remains have been found across western Eurasia, whereas Denisovans have so far been discovered only in their eponymous Siberian cave. Although the two groups’ home turf overlapped in the Altai Mountains, and pos- sibly elsewhere, these areas would have been sparsely populated. With a Neanderthal mother and a Denisovan father, what should the new speci- men be called? “We shy away a little from the word ‘hybrid’,” says Pääbo. The term implies that the two groups are discrete species of human, whereas in reality the boundaries between them are blurry - as the new study shows. Defining a species in the natural world is not always clear-cut, says Harris, and it’s interesting to see that long-running debates about how to categorize organisms are starting to be applied to humans. Whatever scientists decide to call Denny, Skoglund says he would have loved to be able to meet her. “It’s probably the most fas- cinating person who’s ever had their genome sequenced.” ■ 1. Slon, V. et al. Nature doi.org/10.1038/ s41586-018-0455-x (2018). 2. Krause, J. et al. Nature 464, 894-897 (2010). 3. Fu, Q. et al. Nature 524, 216-219 (2015). 4. Brown, S. et al. Sci. Rep. 6, 23559 (2016). Interbreeding episode or event TANGLED TREE A female born to a Neanderthal mother and Denisovan father roughly 90,000 years ago - nicknamed Denny - is one of many examples of interbreeding between ancient human groups. >1 million years ago Mystery hominin species Denisovans Neanderthals Denny’s mother Denny’s father Altai Neanderthal Early modern- human lineage Asians Europeans Africans ~90,000 years ago Vindija Neanderthal All non-African humans carry traces of Neanderthal DNA, owing to pairings some 47,000-65,000 years ago. The ancestry of Denny’s mother was a surprise. She was more closely related to a 55,000-year-old Neanderthal from Vindija cave in Croatia than to an ‘Altai Neanderthal’, who lived in D

මානසික ව්යිද්ය වරයෙක් හමු උනා නම් අගෙයි

කමක් නැහැ සහෝ, ඔයත් මොනවා හරි දන්නවා කියලා කියාගන්න තැනක් නැතිව ඉඳලා මෙතැන හරි හම්බවුණානෙ.

😂😂😂😂😂හලෝ ඔය සියලු බුදුවර ඉන්න කාලේ ලෝකෙ එක ලෙස ම තිබ්බාද කවුද දන්නෙ,

You raised a very important point, and a sort of a missing link to the story..!! I think if the genetics was known at the time, his theory would have been more complete. Millions of years ago, the world suffered from radiation from the skies, as well as from emissions from the thousands of volcanoes (that cooled down to form islands and lakes), constantly affecting the genetics of the offspring.

හලෝ මිනිස්සු ආවේ වදුරන්ගෙ නෙමෙි හැබැයි වදුරෝ,වානර,මේ ගොඩක් අය පැවතෙන්නෙ පොදු සතෙක් ගෙන් ප්රිමටා වර්ගයෙ සතෙක්,අනික ඉතින් ඉස්සර මානව රෑප දැන් වගෙ නෙමේ කෙ.මුනුවර වෙනස් නෙ,

🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣

@@nimeshfernando1067 ඇයි හිනා වුණේ? හෝ හිනා ගියේ ?

@@nimeshfernando1067 ඉස්සෙල්ලම මං දැන ගන්න කැමතියි , හිනා වුණා ද , ගියාද කියලා!

කැමතියි ඒ ගැන දැනගන්න ඒ සම්බන්ධව කියවන්න link තියේද ? විවිධ මත කියවන්න කැමතියි

@@ngjijayasena4119 RU-vid search කරන්න අර මං කිව්ව නම ... එතකොට හොයා ගන්න පුළුවන් වෙයි

"අකාලික" කියන්නේ ත්‍රිලක්ෂණ ධර්මය. ඒක භෞතික අර්ථයෙන් ගන්න එපා. විද්‍යාවේදී අධ්‍යාත්මික පැත්තක් කතා වෙන්නේ නෑ. එතන තියෙන්නේ භෞතිකවාදී විග්‍රහ කිරීම්. ඒක වෙනස් වෙනවා. හැබැයි වෙනස් වෙන්නෙ යාවත්කාලීන වෙන ක්‍රමවේදයකට.

මෙතනින් en.wikipedia.org/wiki/Charles_Darwin පටන් ගන්න මූලාශ්‍ර හොයා ගන්න පුලුවන්.