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The science of… OH GOD IS THAT A SPIDER?!
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I'm scared of spiders. I'm not afraid to admit it. I love them in a scientific sense, or from a "let me look at you from way over here" sense, but that's as close as I get
Here's a look at the science of why some of us are afraid of spiders, snakes, roaches, and other creepy crawlies. Did I evolve to be this way, or did I learn to be afraid of them? It seems to be an open question…
How dangerous ARE spiders? http://burkemuseum.blogspot.com/2010/09/q-how-dangerous-are-spiders-to-humans.html#.VECZZNR4pj5
Humans may have evolved to pick out spiders and snakes from environment: http://www.apa.org/news/press/releases/2001/09/snakes.aspx
The overlapping worlds of fear conditioning from innate fear: http://instruct.uwo.ca/psychology/371g/Ohman2001.pdf
Doctor Who study suggests that spider fear may not be innate: http://www.wired.com/2014/01/doctor-who-and-spider-phobia/
Most common phobias: http://psychology.about.com/od/phobias/p/commonphobias.htm
Adults and kids pick out creepy animals quicker than non-creepy animals: http://www.livescience.com/2348-fear-snakes.html
Children report spiders as a top fear: http://www.sciencedirect.com/science/article/pii/S0005796797000508
List of clips featured in this episode: http://bit.ly/1xFhdO9
Have an idea for an episode or an amazing science question you want answered? Leave a comment below!
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Produced by PBS Digital Studios: http://www.youtube.com/user/pbsdigitalstudios
Joe Hanson - Host and writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer
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"Ouroboros" by Kevin MacLeod
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Music: "Two Boys and a Girl" - Podington Bear
Last week's video:
Ebola - The Full Story https://www.youtube.com/watch?v=B44JfptNuG0
Why Did We Blow on NES Games? https://www.youtube.com/watch?v=4Gf9mtXnJfM
The Science of Game of Thrones - https://www.youtube.com/watch?v=Utu-LpJn3Is
The Far Future of the Universe - https://www.youtube.com/watch?v=Jl9DwNOonOA
There Was No First Human - https://www.youtube.com/watch?v=xdWLhXi24Mo
How The Elements Got Their Names - https://www.youtube.com/watch?v=mtg9p6A6xnY
This site provides links to random videos hosted at YouTube, with the emphasis on random.
The original idea for this site actually stemmed from another idea to provide a way of benchmarking the popularity of a video against the general population of YouTube videos. There are probably sites that do this by now, but there wasn’t when we started out. Anyway, in order to figure out how popular any one video is, you need a pretty large sample of videos to rank it against. The challenge is that the sample needs to be very random in order to properly rank a video and YouTube doesn’t appear to provide a way to obtain large numbers of random video IDs.
Even if you search on YouTube for a random string, the set of results that will be returned will still be based on popularity, so if you’re using this approach to build up your sample, you’re already in trouble. It turns out there is a multitude of ways in which the YouTube search function makes it very difficult to retrieve truly random results.
So how can we provide truly random links to YouTube videos? It turns out that the YouTube programming interface (API) provides additional functions that allow the discovery of videos which, with the right approach, are much more random. Using a number of tricks, combined some subtle manipulation of the space-time fabric, we have managed to create a process that yields something very close to 100% random links to YouTube videos.
YouTube is an American video-sharing website headquartered in San Bruno, California. YouTube allows users to upload, view, rate, share, add to playlists, report, comment on videos, and subscribe to other users. It offers a wide variety of user-generated and corporate media videos. Available content includes video clips, TV show clips, music videos, short and documentary films, audio recordings, movie trailers, live streams, and other content such as video blogging, short original videos, and educational videos. Most content on YouTube is uploaded by individuals, but media corporations including CBS, the BBC, Vevo, and Hulu offer some of their material via YouTube as part of the YouTube partnership program. Unregistered users can only watch videos on the site, while registered users are permitted to upload an unlimited number of videos and add comments to videos. Videos deemed potentially inappropriate are available only to registered users affirming themselves to be at least 18 years old.
YouTube and selected creators earn advertising revenue from Google AdSense, a program which targets ads according to site content and audience. The vast majority of its videos are free to view, but there are exceptions, including subscription-based premium channels, film rentals, as well as YouTube Music and YouTube Premium, subscription services respectively offering premium and ad-free music streaming, and ad-free access to all content, including exclusive content commissioned from notable personalities. As of February 2017, there were more than 400 hours of content uploaded to YouTube each minute, and one billion hours of content being watched on YouTube every day. As of August 2018, the website is ranked as the second-most popular site in the world, according to Alexa Internet, just behind Google. As of May 2019, more than 500 hours of video content are uploaded to YouTube every minute.
YouTube has faced criticism over aspects of its operations, including its handling of copyrighted content contained within uploaded videos, its recommendation algorithms perpetuating videos that promote conspiracy theories and falsehoods, hosting videos ostensibly targeting children but containing violent and/or sexually suggestive content involving popular characters, videos of minors attracting pedophilic activities in their comment sections, and fluctuating policies on the types of content that is eligible to be monetized with advertising.