Tag results for evolutionary
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bi-polar ape 4-part series: why is america so violent
Bookmarked 705 weeks ago frans de waal discusses the evolutionary evidence behind crowding and it039s impact on human aggression |
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why echidnas are evolutionary misfits
Bookmarked 416 weeks ago go to squarespacecomscishow for a free trial and use the offer code scishow to support this channel and save 10 off your first purchase of a website or domainits pretty well known that australia is home to some strange animals but echidnas are especially weird evolutionary misfits hosted by: hank green----------support scishow by becoming a patron on patreon: https:wwwpatreoncomscishow----------dooblydoo thanks go to the following patreon supporters: kelly landrum jones sam lutfi kevin knupp nicholas smith da noe alexander wadsworth piya shedden katiemarie magnone scott satovsky jr charles southerland bader alghamdi james harshaw patrick merrithew patrick d ashmore candy tim curwick charles george saul mark terrio-cameron viraansh bhanushali kevin bealer philippe von bergen chris peters justin lentz----------looking for scishow elsewhere on the internetfacebook: http:wwwfacebookcomscishowtwitter: http:wwwtwittercomscishow |
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why your brain is in your head
Bookmarked 604 weeks ago check out braincraft: http:youtubeaucscx191vq subscribe to it039s okay to be smart: http:bitlyiotbs_sub more info and sources below follow on twitter: http:twittercomjtotheizzoefollow on tumblr: http:wwwitsokaytobesmartcom part 1 of 3 in my series about why our bodies are shaped the way they are stay tuned for part 2 and 3 later this week make sure you head over braincraft and check out the rest of our collaborationmore info:still of that crazy face comes from fka twigs039 quotwater mequot: http:youtubekftml-uipa8 evolution of the nervous system: http:enwikipediaorgwikievolution_of_nervous_systems step by step along the evolutionary tree: http:tolweborgbilateria2459http:enwikipediaorgwikibilateriahttp:enwikipediaorgwikideuterostomehttp:enwikipediaorgwikiprotostomehttp:enwikipediaorgwikiurochordatahttp:enwikipediaorgwikichordatehttp:enwikipediaorgwikicephalochordatahttp:enwikipediaorgwikicraniatehttp:enwikipediaorgwikignathostomata evolutionary timeline of vertebrates: http:wwwutexasedunews20080303tree how old are hox genes: http:wwwnaturecomnrgjournalv8n5fullnrg2114html hox genes in development: the hox code http:wwwnaturecomscitabletopicpagehox-genes-in-development-the-hox-code-41402 -----------------have an idea for an episode or an amazing science question you want answered leave a comment belowfollow me on twitter: jtotheizzoeemail me: itsokaytobesmart at gmail dot comfacebook: http:wwwfacebookcomitsokaytobesmartgoogle https:plusgooglecomitsokaytobesmart for more awesome science check out: http:wwwitsokaytobesmartcomjoe hanson - host and writerjoe nicolosi - directoramanda fox - producer spotzen inckate eads - associate producerkatie graham - director of photographymotion graphics and editing - artslaborstephanie noone - producer artslaborjohn knudsen - gaffermusic:quotouroborosquot by kevin macleodartworkphotos via shutterstockproduced by pbs digital studios: http:wwwyoutubecomuserpbsdigitalstudios -----------last week039s video: why did we blow on nes games https:wwwyoutubecomwatchv=4gf9mtxnjfm more videos:the science of bbq https:wwwyoutubecomwatchv=ccqovmsybo4 the science of game of thrones - https:wwwyoutubecomwatchv=utu-lpjn3is the far future of the universe - https:wwwyoutubecomwatchv=jl9dwnoonoa there was no first human - https:wwwyoutubecomwatchv=xdwlhxi24mo how the elements got their names - https:wwwyoutubecomwatchv=mtg9p6a6xny |
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david attenborough: amber time machine bbc
Bookmarked 720 weeks ago please subscribe to the evolution documentary youtube channel:http:wwwyoutubecomevolutiondocumentarybroadcast 1996 david attenborough turns his life long fascination with amber into a time travelling detective story that spans 150 million years examining and identifying the contents of this unique material he opens a window into prehistoric tropical rainforests and unravels detailed stories about the plants and animals that lived there the episode shows attenborough searching for the identities of preserved creatures inside a piece of baltic amber that was given to him by his adoptive sister when he was twelve years old the amber time machine is part of the attenborough in paradise and other personal voyages a collection of seven documentariesit shows how a group of scientists can reconstruct an entire twenty million year old ecosystem through pieces of dominican amber examples include a tadpole preserved in amber after falling from a bromeliad attenborough then discusses the scientific feasibility of dna being preserved in amber and the science behind the 1993 hit techno thriller jurassic park in which richard attenborough starred as john hammond several attempts were tried with dna eventually being recovered from a weevil that was several million years older than tyrannosaurus rex attenborough reasons that a few old rare pieces of amber may contain dnaamber is fossilized tree resin not sap which has been appreciated for its color and natural beauty since neolithic times amber is used as an ingredient in perfumes as a healing agent in folk medicine and as jewelry there are five classes of amber defined on the basis of their chemical constituents as it originates as a soft sticky tree resin amber sometimes contains animal and plant material amber occurring in coal seams is also called resinite and the term ambrite is applied to that found specifically within new zealand |
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woolly mammoth: secrets from the ice bbc documentary 2012
Bookmarked 719 weeks ago please subscribe to the evolution documentary youtube channel:http:wwwyoutubecomevolutiondocumentarybroadcast 2012 professor alice roberts reveals the natural history of the most famous of ice age animals - the woolly mammoth mammoths have transfixed humans since the depths of the last ice age when their herds roamed across what is now europe and asia although these curious members of the elephant family have now been extinct for thousands of years scientists can now paint an incredibly detailed picture of their lives thanks to whole carcasses that have been beautifully preserved in the siberian permafrost alice meets the scientists who are using the latest genetic chemical and molecular tests to reveal the adaptations that allowed mammoths to evolve from their origins in the tropics to surviving the extremes of siberia and in a dramatic end to the film she helps unveil a brand new woolly mammoth carcass that may shed new light on our own ancestors039 role in their extinction |
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dogs decoded nova documentary
Bookmarked 717 weeks ago please subscribe to the evolution documentary youtube channel:http:wwwyoutubecomevolutiondocumentarybroadcast 2010 quotdogs decodedquot reveals the science behind the remarkable bond between humans and their dogs and investigates new discoveries in genetics that are illuminating the origin of dogswith surprising implications for the evolution of human culture other research is proving what dog lovers have suspected all along: dogs have an uncanny ability to read and respond to human emotions humans in turn respond to dogs with the same hormone responsible for bonding mothers to their babies how did this incredible relationship between humans and dogs come to be and how can dogs so closely related to fearsome wild wolves behave so differentlydogs have been domesticated for longer than any other animal on the planet and humans have developed a unique relationship with these furry friends we treat our pets like a part of the family and feel that they can understand us in a way other animals can039t now new research is revealing what dog lovers have suspected all along: dogs have an uncanny ability to read and respond to human emotions humans in turn respond to dogs with the same hormone responsible for bonding mothers to their babies how did this incredible relationship between humans and dogs come to be and how can dogs so closely related to fearsome wild wolves behave so differently it039s all in the genesdogs decoded investigates new discoveries in genetics that are illuminating the origin of dog - with big implications for the evolution of human culture as well in siberia the mystery of dogs039 domestication is being repeated--in foxes a fifty-year-old breeding program is creating an entirely new kind of creature a tame fox with some surprising similarities to man039s best friend |
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what really killed the dinosaurs bbc
Bookmarked 753 weeks ago please subscribe to the whyevolutionistrue youtube channelhttp:wwwyoutubecomwhyevolutionistruebbc documentary list:http:tinyurlcom6yayzxmbroadcast 2004 until recently most scientists thought they knew what killed off the dinosaurs a 10km-wide meteorite had smashed into the yucatan peninsula in mexico causing worldwide forest fires tsunamis several kilometres high and an 039impact winter039 - in which dust blocked out the sun for months or years it was thought that the dinosaurs were blasted roasted and frozen to death in that orderbut now a small but vociferous group of scientists believes there is increasing evidence that this 039impact039 theory could be wrong that suggestion has generated one of the bitterest scientific rows of recent timesthe impact theory: the impact theory was beautifully simple and appealing much of its evidence was drawn from a thin layer of rock known as the 039kt boundary039 this layer is 65 million years old which is around the time when the dinosaurs disappeared and is found around the world exposed in cliffs and minesfor supporters of the impact theory the kt boundary layers contained two crucial clues in 1979 scientists discovered that there were high concentrations of a rare element called iridium which they thought could only have come from an asteroid right underneath the iridium was a layer of 039spherules039 tiny balls of rock which seemed to have been condensed from rock which had been vaporized by a massive impacton the basis of the spherules and a range of other evidence dr alan hildebrand of the university of calgary deduced that the impact must have happened in the yucatan peninsula at the site of a crater known as chicxulub chemical analysis later confirmed that the spherules had indeed come from rocks within the craterchallenging the theory: a group of scientists led by prof gerta keller of princeton and prof wolfgang stinnesbeck of the university of karlsruhe begged to differ they uncovered a series of geological clues which suggests the truth may be far more complicated in short that the crater in the yucatan is too old to have killed off the dinosaursthey concentrated on a series of rock formations in mexico where the iridium layer was separated from the spherule layer by many metres of sandstone that opinion sparked a massive row as the supporters of the impact theory such as prof jan smit of vrije universiteit amsterdam rubbished keller039s ideas smit argued that the sandstone had been deposited by massive tsunami waves caused by the asteroid and so did not undermine the idea of a single impactbut keller039s team found evidence - such as ancient worm burrows - that suggested that the deposition of the sandstone had been interrupted many times they concluded that there was a gap of some 300000 years between the deposition of the spherules from the chicxulub crater and the iridium from an asteroid therefore there must have been two impacts |
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hitchens - reasons to doubt theism
Bookmarked 771 weeks ago philosophy is doubt- michel de montaigne in a world of charlatans skepticism is a virtue and faith a vice in a world of suffering and extinction evolutionary naturalism is more probable than theistic intervention quoti always have to think too of a little boy sitting on the banks of a river in west africa who has a worm boring through his eyeball turning him blind before he039s five years old and i reply and say quotwell presumably the god you speak about created the worm as wellquot and now i find that baffling to credit a merciful god with that actionquot-david attenboroughcharles darwin--quotthat there is much suffering in the world no one disputes which is more likely that pain and evil are the result of an all-powerful and good god or the product of uncaring natural forces the presence of much suffering agrees well with the view that all organic beings have been developed through variation and natural selectionquotpaul draper:theism is less plausible than naturalism-natural selection accounts for all or almost all of the fantastic complexity we find in the living world:e: for a variety of biological and ecological reasons organisms compete for survival with some having an advantage in the struggle for survival over others as a result many organisms including many sentient beings never flourish because they die before maturity many others barely survive but languish for most or all of their lives and those that reach maturity and flourish for much of their lives usually languish in old age in the case of human beings and some nonhuman animals as well languishing often involves intense or prolonged suffering naturalism is by virtue of its smaller scope and greater simplicity a more plausible hypothesis than theism and also that naturalism has much greater predictive power than theismi can live with doubt and uncertainty and not knowing i think it039s much more interesting to live not knowing than to have answers which might be wrong i have approximate answers and possible beliefs and different degrees of certainty about different things but im not absolutely sure of anything and in many things i dont know anything about such as whether it means anything to ask why were here and what the question might mean i might think about a little but if i cant figure it out then i go to something else but i dont have to know an answer i dont feel frightened by not knowing things by being lost in a mysterious universe without having any purpose which is the way it really is as far as i can tell possibly it doesnt frighten merichard feynman |
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how science changed our world - bbc
Bookmarked 745 weeks ago how science changed our world - bbcprofessor robert winston presents his top ten scientific breakthroughs of the past 50 years tracing these momentous and wide-ranging discoveries he meets a real-life bionic woman one of the first couples to test the male contraceptive pill and even some of his early ivf patients he explores the origins of the universe probes the inner workings of the human mind and sees the most powerful laser in the world to finish professor winston reveals the breakthrough he thinks is most significant |
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