Features the most insightful and informative videos on all areas of the sciences, history, philosophy, and the arts, with an additional focus on the values of Humanism, Freethought and methodological Skepticism.
If there are any freely available programs or shows which you know of that I missed, please let me know about them.
Eschaton 2012 - Chance in evolution
Paul Zachary “PZ” Myers is an American biology professor at the University of Minnesota Morris (UMM), answering evolutionary developmental biology (evo-devo) questions using zebrafish. He is the author of the award-winning Pharyngula science blog, hosted on Freethought Blogs network, and a columnist for Free Inquiry, published by the Center for Inquiry. A self-avowed “godless liberal” and outspoken atheist, he is a public critic of the intelligent design (ID) / creationist movement and an activist in the American creation-evolution controversy.
He is widely regarded as a confrontationalist and is notorious for having destroyed a Communion wafer, Bible, Quran, and copy of The God Delusion on video as political and philosophical statements.
via Atheism TV.
Why doesn’t Honey spoil? தேன் கெடாததற்கு என்ன காரணம்?
Honey stays unspoilt for 1000s of years. Why? தேன் ஆயிரக்கணக்கான வருசமா கெடாம அப்படியே இருக்கே, ஏன்?
via / வழியேNirmukta Videos.
Placebos & Nocebos: How Your Brain Heals and Hurts You
You’ve probably heard how some drugs and treatments make people feel better, even when they turn out to be fake. That’s the placebo effect, but how does it work? And could the same effect backfire, causing your brain to make you feel sick when your body is not? Michael Aranda fills in for Hank and explains how these effects go beyond mere mind-over-matter.
How to Make a Seashell - Just Add Water!
MinuteEarth provides an energetic and entertaining view of trends in earth’s environment — in just a few minutes!
Thank you to James Cook University - http://www.jcu.edu.au/ And to the following Subbable supporters, who also help make MinuteEarth possible:
@Najamuddin - www.facebook.com/najamuddin
@JonAtkins57 - atkinsps.com
Gustav Delius - https://plus.google.com/+GustavDelius
How much it costs to make MinuteEarth - http://www.reddit.com/r/minutevids/comments/1qbim2/how_much_minuteearth_costs_to_make/
SCI CODE - Sugarless Gum vs Cavities
Previously we learned that there are bacteria in our mouths that eat sugar and poop out acid. The acid can reduce the pH balance of our mouths.
pH is the measure of a solution’s acidity or basicity. Water is neutral- pH 7. And anything lower is acidic.
If the pH in our mouths drops below 5.5, acids can start to wreck your teeth. However, studies show that chewing sugarless gum after eating can help reduce acid levels.
As you chew the gum, you begin to salivate. The increased flow of saliva washes away and neutralizes the acid-turds of those sugar hungry microbes. The increased saliva also brings in calcium and phosphates to strengthen tooth enamel.
While chewing sugarless gum may be effective in laying the smack down on tooth decay, you still have to brush and floss regularly and properly for a healthy smile. No exceptions!
For more information and a list of approved sugar-free gums, check out the American Dental Association.
Chromosome 9 - It’s in the blood
Blood transfusion used to be a hit & miss affair, until the discovery of blood groups. The group most people have heard of is the ABO group, controlled by a gene on Chromosome 9 as explained by Nicole Thornton. This gene controls what blood type you are - whether A, B, O or AB. However, there are actually over 30 other blood group systems, most of which are extremely rare.
Nicole explains the consequences of receiving blood from the wrong blood group as she chats to Olympia Brown, who learns what blood group she is when giving blood, and how important it is that as many different people donate blood, the first stage in the blood transfusion process.
With thanks to BBSRC: http://bbsrc.ac.uk/
Bite Sci-zed - Reindeer Eyes
Reindeer Eye paper here:
Flight Calls Reveal Bird Migration Patterns
Video dispatch given by Boonsri Dickinson.
Birds migrate at night and use flight calls to communicate with each other. Andrew Farnsworth, an ornithologist at The Cornell Lab of Ornithology, has been recording the calls migratory birds make at night to keep track of their migration patterns.
I went to visit Andrew on the west side of Manhattan.
Andrew discovered that body mass might drive the variation in flight calls of different species. Some of the questions that remain are: Why do some species not even use flight calls? Are the flight calls related to other traits? Are flight calls learned? The problem is that unknown bird species identity and lack of information about the variation in the bird calls make it difficult to monitor bird populations. But Farnsworth is doing his best, and he described the challenges of analyzing the sounds in this episode of Bird Migration.
Just because Andrew can record bird calls, it doesn’t mean it’s easy to make sense of all the auditory data that comes in. One of the difficulties lies in identifying bird species. Another difficulty is the lack of information about variation in bird calls, which makes it hard to monitor bird populations. Birds have unique sounds because genetics play a big role in what they sound like. During his research, Andrew discovered that the bird’s body mass might drive the variation in flight calls in different species. Andrew told me that when we analyze certain species that are related, and how their acoustic signals are related (which means if the birds are related to each other genetically), they sound more alike.
To help sort through the audio recordings, Andrew uses algorithms that can organize the calls and categorize bird species. In one of Andrew’s research papers, I learned that the calls are generally in the 1-9 kilohertz frequency band and last about 50-300 millisecond in duration. It’s worth noting that the flight calls are not the same as the songs and other short calls birds make such as chip notes and alarm calls.
But today near the water, Andrew described his scientific approach to recording audio. I was surprised at how DIY it was. He also pointed out that to confirm what he’s recording at night, it is important to document the birds people see during the day and where they see them. Citizen scientists can document their observations on a database called eBird.
Bird migration gives us an idea of what’s happening around the world and how our urban lifestyle affects birds’ migratory decisions. Besides the obvious physical dangers of flying across the world, like getting eaten by a predator or getting lost in light pollution, other factors can affect the migratory paths of birds such as climate change. Why are weather patterns making birds migrate earlier than before? The timing of the migration is important because it indicates the health of the bird species and provides a sense of the state of biodiversity on our planet.
The best part of the trip was spotting a bald eagle! I zoomed in so you could see it too!
For more information on Andrew, check out his website:
And read more about his scientific lifestyle in a recent New York Times article:
Chromosome 8 - Stem Cells: a Gnome’s Destiny
The human body is made up of more than 200 different types of cell, and it used to be believed that once these cells have grown and differentiated (or specialised) into different types, that their fate is then fixed. In this video science presenter Simon Watts explains how we can re-shape the destiny of our cells by turning adult cells back into stem cells by manipulation of the c-Myc gene on chromosome 8.
This discovery led to the award of the Nobel Prize in Medicine to Shinya Yamanaka in 2012. Using our greater understanding of this and related genes, stem cells can be used to make any cell we want. This could, in future, allow us to regrow or repair organs without danger of tissue rejection.
With thanks to BBSRC: http://bbsrc.ac.uk/
Bacon Hates You!
The hot sizzle of it on the pan. The erotic plop of bacon hitting the fryer. Bacon is to breakfast what genitals are to sexy and Bacon Hates You!
via Nature Hates You.
5 Eye Myths - Epic Science
Sure some of us use our eyes to stare meaningfully into the distance, or to watch our fellow humans make word salad on the Internet. But how much do you really know about this exquisite sensory system?
Chromosome 7 - I know why the caged bird sings
It has been speculated that the gene FOXP2 on chromosome 7 is linked to the uniquely human skill of processing language. Researchers have proposed that it is also linked to the ability of song birds, like the canary, to learn their beautifully complex songs.
They have also suggested that the role this gene plays is linked to neuroplasticity - thow your brain changes over time. To learn something, the brain must change. Research is still continuing, but in the meantime you can enjoy this beautiful bird in action.
With thanks to BBSRC: http://bbsrc.ac.uk/
Skin Eating Fish in SE Asia! - Quick Travel Update
Welcome to Dr. Fish, the fish that will clean dead skin off your feet. Jonas found this little fish in the markets of SE Asia! Turns out it’s one of a few small fish related to carp - Garra rufa or Cyprinion macrostomum.
via Untamed Science.
How to Survive a Grizzly Bear Attack
One of the fiercest animals in North America is the Grizzly Bear and they just happen to live in some of the most scenic environments in the world. Learn how to protect yourself when stepping on their turf while taking advantage of North America’s beauty.
via The Discovery Lists.