In this video I’m showing the process of working on an oil painting titled "Soft morning color" - 50 x 60 cm (19.7 x 23.6 inches)

REAL-TIME PAINTING VIDEOS, TUTORIALS and other helpful materials ▶ https://www.patreon.com/dariacallie

▷ For prints and original paintings please visit https://dariacallie.com/store/


CONNECT WITH ME:
Instagram: https://www.instagram.com/dariacallie/
Facebook: https://www.facebook.com/DariaCallieArt/
Website: https://www.dariacallie.com/

Materials used:

• Oil paints - Nevskaya palitra (russian brand)
Colors: Burnt umber, Cadmium Yellow, Ultramarine Blue, Cadmium Red and Titanium White.
In addition I have a couple of colors that I use sometimes: Ivory Black, Celestial Blue and Cobalt Violet Deep.
• Primed linen canvas (from a local art-store)
• Paint thinner (odorless mineral spirits)
• Medium (stand linseed oil)
• Brushes - Detail brushes & Filbert synthetic brushes of different sizes
• Glass palette (homemade)
• Palette knife (from a local art-store)
• Paper towels (or tissues that I use to wipe the brushes)

Music: Paperchaser “Better left unsaid”
https://soundcloud.com/paperchaser-music

In this painting demo I’ll show how I paint a bunny with oils.

REAL-TIME PAINTING VIDEOS, TUTORIALS and other helpful materials ▶ https://www.patreon.com/dariacallie

▷ For prints and original paintings please visit https://dariacallie.com/store/



CONNECT WITH ME:
Instagram: https://www.instagram.com/dariacallie/
Facebook: https://www.facebook.com/DariaCallieArt/
Website: https://www.dariacallie.com/


Materials used:
• Oil paints - "Nevskaya palitra"
Colors: Burnt Umber, Cadmium Yellow Pale, Ultramarine Blue, Cadmium Red and Titanium White, Ivory Black.
• Primed 280gsm paper
• Paint thinner (odorless mineral spirits)
• Medium (stand linseed oil)
• Brushes - Detail brushes & Filbert synthetic brushes of different sizes
• Glass palette (homemade)
• Palette knife (from a local art-store)
• Paper towels (or tissues that I use to wipe the brushes)


Music: “We left the place (post-rock)” by Mindthings
https://soundcloud.com/mindthi....ngs/we-left-the-plac

In this video I’m painting a portrait with oils, 12 x 12 inches.

REAL-TIME PAINTING VIDEOS, TUTORIALS and other helpful materials ▶ https://www.patreon.com/dariacallie/overview


Commissions: closed.

CONNECT WITH ME:
Instagram: https://www.instagram.com/dariacallie/
Facebook: https://www.facebook.com/DariaCallieArt/
Website: https://www.dariacallie.com/


Materials used:
• Oil paints - "Nevskaya palitra"
• Primed linen canvas
• Paint thinner (odorless mineral spirits)
• Medium (stand linseed oil)
• Brushes - round detail brushes in sizes 1, 0 and 00; and synthetic filbert brushes in different sizes.
• Glass palette (homemade)
• Palette knife (from a local art-store)
• Paper towels (or tissues that I use to wipe the brushes)


Music: “All Of A Sudden” by Joachim Heinrich
https://soundcloud.com/joachimheinrich

In this painting demo I show how I paint an eye with oils.

REAL-TIME PAINTING VIDEOS, TUTORIALS and other helpful materials ▶ https://www.patreon.com/dariacallie

Reference Photo: https://www.dropbox.com/s/szwx....5vymzudskay/Referenc


▷ For prints and original paintings please visit https://dariacallie.com/store/

CONNECT WITH ME:
Instagram: https://www.instagram.com/dariacallie/
Facebook: https://www.facebook.com/DariaCallieArt/
Website: http://www.dariacallie.com/


Materials used:

• Oil paints - Gamblin Oil Colors and Nevskaya palitra (russian brand)
Colors: Burnt umber, Cadmium Yellow, Ultramarine Blue, Cadmium Red and Titanium White.
(I have a color-mixing video where I explain how I premix my palette - https://youtu.be/kKT1gXBC_L4 )
In addition I have a couple of colors that I use sometimes: Ivory Black, Celestial Blue and Cobalt Violet Deep.
• Acrylic primer
• Paper 30 x 30 cm (12 x 12 inches) 280gsm
• Paint thinner (odorless mineral spirits)
• Medium (stand linseed oil)
• Brushes - Detail brushes & Filbert synthetic brushes of different sizes
• Glass palettes (homemade)
• Palette knife (from a local art-store)
• Paper towels (or tissues that I use to wipe the brushes)


Music: “re:MEMORY” by A. Taylor
https://soundcloud.com/a-taylor

In this video I’m showing the process of working on an oil painting titled “Intuition” - 30 x 30 cm (12 x 12 inches)


CONNECT WITH ME:
Instagram: https://www.instagram.com/dariacallie/
Facebook: https://www.facebook.com/DariaCallieArt/
Website: http://www.dariacallie.com/


* Jukin Media Verified *
Find this video and others like it by visiting https://www.jukinmedia.com/licensing/view/966827
For licensing / permission to use, please email licensing(at)jukinmedia(dot)com.


Materials used:

• Oil paints - Gamblin Oil Colors and Nevskaya palitra (russian brand)
Colors: Burnt umber, Cadmium Yellow, Ultramarine Blue, Red and Titanium White. (I have a color-mixing video where I explain how I premix my palette) In addition I have a couple of colors that I use very rarely: Ivory Black, Celestial Blue and Cobalt Violet Deep.
• Primed linen canvas (from a local art-store)
• Paint thinner (odorless mineral spirits)
• Medium (stand linseed oil)
• Brushes - Detail brushes & Filbert synthetic brushes of different sizes
• Glass palette (homemade)
• Palette knife (from a local art-store)
• Varnish
• Paper towels (or tissues that I use to wipe the brushes)


Music: Walking On A Dream (Empire of the Sun cover) by Kongsingwei
Music License: https://creativecommons.org/licenses/by/3.0/

In this painting demo I’ll show how I paint a portrait with oils.
Oil on canvas, 30 x 30 cm (~12 x 12 inches)

REAL-TIME PAINTING VIDEOS, TUTORIALS and other helpful materials ▶ https://www.patreon.com/dariacallie

▷ For prints and original paintings please visit https://dariacallie.com/store/

CONNECT WITH ME:
Instagram: https://www.instagram.com/dariacallie/
Facebook: https://www.facebook.com/DariaCallieArt/
Website: http://www.dariacallie.com/


Materials used:

• Oil paints - Gamblin Oil Colors and Nevskaya palitra (russian brand)
Colors: Burnt umber, Cadmium Yellow, Ultramarine Blue, Red and Titanium White. (I have a color-mixing video where I explain how I premix my palette) In addition I have a couple of colors that I use very rarely: Ivory Black, Celestial Blue and Cobalt Violet Deep.
• Primed linen canvas (from a local art-store)
• Paint thinner (odorless mineral spirits)
• Medium (stand linseed oil)
• Brushes - Detail brushes & Filbert synthetic brushes of different sizes
• Glass palette (homemade)
• Palette knife (from a local art-store)
• Varnish
• Paper towels (or tissues that I use to wipe the brushes)


Music: The Next Step - Classical guitar instrumental by The Tinkerbell Effect
SoundCloud: https://soundcloud.com/thetink....erbelleffect/the-nex
Music License: https://creativecommons.org/licenses/by/3.0/

Music: Acoustic/Pop/Rock/Alternative - Acoustically driven instrumental by Hyde
SoundCloud: https://soundcloud.com/davidhy....demusic/acoustic-pop
Music License: https://creativecommons.org/licenses/by/3.0/

Viewers like you help make PBS (Thank you

Viewers like you help make PBS (Thank you

Viewers like you help make PBS (Thank you

Viewers like you help make PBS (Thank you

Viewers like you help make PBS (Thank you

Check out Two Cents: https://www.youtube.com/channe....l/UCL8w_A8p8P1HWI3k6

Due to an odd quirk of genetics and some unique evolutionary circumstances, two humans who lived at different times in the distant past managed to pass on a very small fraction of their genomes to you. And to me. To all of us.

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Super special thanks to the following Patreon patrons for helping make Eons possible:

Katie Fichtner, Aldo Espinosa Zúñiga, Anthony Callaghan, الخليفي سلطان, Gabriel Cortez, Marcus Lejon, Anel Salas, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman, Betsy Radley, Svetlana Pylaeva, Colin Sylvester, Philip Slingerland, John Vanek, Jose Garcia, Noah offitzer, Eric Vonk, Tony Wamsley, Henrik Peteri, Jonathan Wright, Jon Monteiro, James Bording, Brad Nicholls, Miles Chaston, Michael McClellan, Jeff Graham, Maria Humphrey, Nathan Paskett, Connor Jensen, Sapjes, Daisuke Goto, Hubert Rady, Yuntao Zhou, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao. Tsee Lee, Sarah Fritts, Ruben Winter, Ron Harvey Jr, Joshua Mitchell, Johnny Li, Jacob Gerke, Alex Yan

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References:
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC33345
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC32671
https://pdfs.semanticscholar.o....rg/f4ee/6bfac21f39ac
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC58921
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC40321
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC55008
http://haplogroup-a.com/Ancient-Root-AJHG2013.pdf
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC54183
http://ase.tufts.edu/chemistry..../hhmi/documents/Prot
http://pages.ucsd.edu/~dkjorda....n/resources/clarific
https://www.cell.com/action/sh....owPdf?pii=S0960-9822
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC43679
https://www.cell.com/action/sh....owPdf?pii=S0002-9297
https://www.newscientist.com/a....rticle/mg22429904-50
https://www.smithsonianmag.com..../science-nature/no-m
https://www.nature.com/news/ge....netic-adam-and-eve-d
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC55252
https://www.hhmi.org/biointera....ctive/evolution-y-ch
http://www.pnas.org/content/106/38/16018
https://www.nature.com/articles/jhg2012154
https://academic.oup.com/mbe/a....rticle/27/8/1833/988
https://www.nature.com/articles/325031a0
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC26949
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC43815
https://www.ncbi.nlm.nih.gov/pubmed/28086175

Support us on Patreon! http://patreon.com/eons

The best evidence we have suggests that, while Caviomorpha originated in South America, they came from ancestors in Africa, over 40 million years ago. So how did they get there?

This episode was written by Genevieve Perdue.

Thanks to Ceri Thomas for the Josephoartigasia monesi reconstruction. Check out more of Ceri's paleoart at http://alphynix.tumblr.com and http://nixillustration.com

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Super special thanks to the following Patreon patrons for helping make Eons possible:

Katie Fichtner, Aldo Espinosa Zúñiga, Anthony Callaghan, Esmeralda Rupp-Spangle, Gregory Donovan, Ehit Dinesh Agarwal, الخليفي سلطان, Gabriel Cortez, Marcus Lejon, Anel Salas, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman, Betsy Radley, PS, Colin Sylvester, Philip Slingerland, John Vanek, Jose Garcia, Noah offitzer, Eric Vonk, Tony Wamsley, Henrik Peteri, Jonathan Wright, Jon Monteiro, James Bording, Brad Nicholls, Miles Chaston, Michael McClellan, Jeff Graham, Maria Humphrey, Nathan Paskett, Connor Jensen, Sapjes, Daisuke Goto, Hubert Rady, Yuntao Zhou, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ruben Winter, Ron Harvey Jr, Jacob Gerke, Alex Yan

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Want to follow Eons elsewhere on the internet?
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References:

https://academic.oup.com/bioli....nnean/article/121/4/
https://link.springer.com/arti....cle/10.1007/s11692-0
https://www.ncbi.nlm.nih.gov/pubmed/21993503
https://www.sciencedirect.com/....science/article/pii/
http://rspb.royalsocietypublis....hing.org/content/275
https://www.researchgate.net/p....ublication/316684055
https://onlinelibrary.wiley.co....m/doi/abs/10.1002/ev
https://www.nature.com/articles/26886
https://journals.plos.org/plos....one/article?id=10.13
https://books.google.com/books..../about/Mammals_of_th
https://scinapse.io/papers/2167227626
https://www.ncbi.nlm.nih.gov/pubmed/21238387
https://onlinelibrary.wiley.co....m/doi/abs/10.1002/jm
http://science.sciencemag.org/content/323/5915/732
https://www.nature.com/scitabl....e/topicpage/the-mole
https://link.springer.com/chap....ter/10.1007/978-1-46
https://www.jstor.org/stable/2999827
https://www.ncbi.nlm.nih.gov/pubmed/10423268
https://onlinelibrary.wiley.co....m/doi/book/10.1002/9
https://www.ncbi.nlm.nih.gov/pubmed/11476632
Lavocat, R. “La syste´matique des rongeurs hystricomorphes et la de´rive des continents.” Comptes Rendus de l'Académie des Sciences Series D 269 (1969).
https://link.springer.com/chap....ter/10.1007/978-1-46
https://onlinelibrary.wiley.co....m/doi/full/10.1111/j
https://www.researchgate.net/p....ublication/256415173
https://www.researchgate.net/p....ublication/263582456
https://www.jstor.org/stable/2401146
Merali, Z., and B.J. Skinner. Visualizing Earth Science (2009). Hoboken: John Wiley & Sons, Inc.
http://rspb.royalsocietypublis....hing.org/content/275
https://academic.oup.com/jmamm....al/article/91/1/11/8
Mones, A., and J. Ojasti. “Hydrochoerus hydrochaeris.” Mammalian Species 264(1986).
https://www.sciencedirect.com/....science/article/pii/
Morrison, M.L., Marcot, B.G., and R.W. Mannan. Wildlife-Habitat Relationships: Concepts and Applications, 3rd ed. (2006). Washington, D.C.: Island Press.
Nowak, R. M. Walker’s mammals of the world, 5th ed. (1991). Baltimore: Johns Hopkins University Press.
http://advances.sciencemag.org..../content/2/8/e160088
https://www.researchgate.net/p....ublication/299560709
https://scinapse.io/papers/184792926
Patton, J. L., Pardiñas, U. F. J., and G. D’Elía. Mammals of South America, Vol. 2, Rodents (2015). Chicago: The University of Chicago Press.
https://www.ncbi.nlm.nih.gov/pubmed/16551580
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC25999
https://www.jstor.org/stable/25654250
Scotese, C.R. “A Continental Drift Flipbook.” The Journal of Geology 112.6 (2004).
Simpson, G.G. 1940. “Mammals and land bridges.” Journal of the Washington Academy of Sciences 30 (1940).
https://www.researchgate.net/p....ublication/282577627

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Try CuriosityStream today: http://curiositystream.com/eons

Fossilized footprints have proved that human ancestors were already striding across the landscape 3.6 million years ago. But who started them on that path? What species pioneered this style of locomotion? Who was the first to walk?

Check out our new sticker! https://store.dftba.com/collec....tions/all/products/e

Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Super special thanks to the following Patreon patrons for helping make Eons possible:
Katie Fichtner, Aldo Espinosa Zúñiga, Anthony Callaghan, Marcus Lejon, Anel Salas, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman, Betsy Radley, Svetlana Pylaeva, Colin Sylvester, Philip Slingerland, John Vanek, Jose Garcia, Noah offitzer, Eric Vonk, Tony Wamsley, Henrik Peteri, Jonathan Wright, Wilco Verweij, Jon Monteiro, James Bording, Brad Nicholls, Miles Chaston, Michael McClellan, Elysha Nygård, Jeff Graham, Maria Humphrey, Nathan Paskett, Connor Jensen, Sapjes, Daisuke Goto, Hubert Rady, Yuntao Zhou, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ruben Winter, Ron Harvey Jr, Joshua Mitchell, Johnny Li, Jacob Gerke, Brandon Burke, Alex Yan

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Want to follow Eons elsewhere on the internet?
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References:
http://humanorigins.si.edu/evi....dence/human-fossils/
http://humanorigins.si.edu/evi....dence/behavior/footp
https://www.smithsonianmag.com..../science-nature/beco
https://www.nature.com/news/20....07/070716/full/news0
Dericquebourg, P., Person, A., Ségalen, L., Pickford, M., Senut, B., & Fagel, N. (2015). Environmental significance of Upper Miocene phosphorites at hominid sites in the Lukeino Formation (Tugen Hills, Kenya). Sedimentary Geology, 327, 43-54.
Thorpe, S. K., McClymont, J. M., & Crompton, R. H. (2014). The arboreal origins of human bipedalism. Antiquity, 88(341), 906-914.
Harcourt-Smith, W. H. (2010). The first hominins and the origins of bipedalism. Evolution: Education and Outreach, 3(3), 333-340.
Brunet, M., Guy, F., Pilbeam, D., Lieberman, D. E., Likius, A., Mackaye, H. T., ... & Vignaud, P. (2005). New material of the earliest hominid from the Upper Miocene of Chad. Nature, 434(7034), 752.
Richmond, B. G., & Jungers, W. L. (2008). Orrorin tugenensis femoral morphology and the evolution of hominin bipedalism. Science, 319(5870), 1662-1665.
Begun, D. R. (2004). The earliest hominins--is less more?. Science, 303(5663), 1478-1480.
Lovejoy, C. O., Latimer, B., Suwa, G., Asfaw, B., & White, T. D. (2009). Combining prehension and propulsion: the foot of Ardipithecus ramidus. Science, 326(5949), 72-72e8.
Lovejoy, C. O., Suwa, G., Spurlock, L., Asfaw, B., & White, T. D. (2009). The pelvis and femur of Ardipithecus ramidus: the emergence of upright walking. Science, 326(5949), 71-71e6.
White, T. D., Suwa, G., & Asfaw, B. (1994). Australopithecus ramidus, a new species of early hominid from Aramis, Ethiopia. Nature, 371(6495), 306.
Leakey, M. G., Feibel, C. S., McDougall, I., & Walker, A. (1995). New four-million-year-old hominid species from Kanapoi and Allia Bay, Kenya. Nature, 376(6541), 565.
White, T. D., WoldeGabriel, G., Asfaw, B., Ambrose, S., Beyene, Y., Bernor, R. L., ... & Hart, W. K. (2006). Asa Issie, Aramis and the origin of Australopithecus. Nature, 440(7086), 883.
Masao, F. T., Ichumbaki, E. B., Cherin, M., Barili, A., Boschian, G., Iurino, D. A., ... & Manzi, G. (2016). New footprints from Laetoli (Tanzania) provide evidence for marked body size variation in early hominins. elife, 5, e19568.
Almécija, S., Tallman, M., Alba, D. M., Pina, M., Moyà-Solà, S., & Jungers, W. L. (2013). The femur of Orrorin tugenensis exhibits morphometric affinities with both Miocene apes and later hominins. Nature Communications, 4, 2888.

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Want more videos about psychology every Monday and Thursday? Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych!

You know what's amazing? That we can talk to people, they can make meaning out of it, and then talk back to us. In this episode of Crash Course Psychology, Hank talks to us and tries to make meaning out of how our brains do this thing called Language. Plus, monkeys!

--
Table of Contents

Phonemes, Morphemes, Grammar 01:48:13
Receptive and Productive Language 03:22:06
Babbling 03:55:22
How We Acquire Language 05:50:22

--
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Want more videos about psychology every Monday and Thursday? Check out our sister channel SciShow Psych at https://www.youtube.com/scishowpsych!

I'm sure you've heard of Pavlov's Bell (and I'm not talking about the Aimee Mann song), but what was Ivan Pavlov up to, exactly? And how are our brains trained? And what is a "Skinner Box"? All those questions and more are answered in today's Crash Course Psychology, in which Hank talks about some of the aspects of learning.

--
Table of Contents

Associative Learning 01:33:17
Behaviorist Theory 04:32:05
Classical and Operant Conditioning 03:47:01
Positive and Negative Reinforcement 07:18:22
Reinforcement Scheduling 09:32:02

--
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Gases are everywhere, and this is good news and bad news for chemists. The good news: when they are behaving themselves, it's extremely easy to describe their behavior theoretically, experimentally and mathematically. The bad news is they almost never behave themselves.
In this episode of Crash Course Chemistry, Hank tells how the work of some amazing thinkers combined to produce the Ideal Gas Law, how none of those people were Robert Boyle, and how the ideal gas equation allows you to find out pressure, volume, temperature or number of moles. You'll also get a quick introduction to a few jargon-y phrases to help you sound like you know what you're talking about.

Table of Contents
Ideal Gas Law Equation 0:50
Everyone But Robert Boyle 1:35
Ideal Gas Law to Figure Out Things 6:16
Jargon Fun Time 7:46

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In which John Green teaches you about the American Revolution and the American Revolutionary War, which it turns out were two different things. John goes over the issues and events that precipitated rebellion in Britain's American colonies, and he also explores the ideas that laid the groundwork for the new American democracy. Find out how the tax bill from the Seven Years War fomented an uprising, how the Enlightenment influenced the Founding Fathers, and who were the winners and losers in this conflict.(hint: many of the people living in the Colonies ended up losers) The Revolution purportedly brought freedom and equality to the Thirteen Colonies, but they weren't equally distributed. Also, you'll learn about America's love affair with commemorative ceramics and what happens when rich white guys take the reins from reins white guys, and put together a society of, by, and for rich white guys.

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