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The ability to make and use fire has fundamentally changed the arc of our evolution. The bodies we have today were, in many ways, shaped by that time when we first tamed fire.

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

Katie Fichtner, Anthony Callaghan, Robert Amling, Po Foon Kwong, Larry Wilson, Merri Snaidman, Renzo Caimi Ordenes, John Vanek, Neil H. Gray, Marilyn Wolmart, Esmeralda Rupp-Spangle, Gregory Donovan, Ehit Dinesh Agarwal, الخليفي سلطان, Gabriel Cortez, Marcus Lejon, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman, Betsy Radley, PS, Philip Slingerland, Jose Garcia, 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, Daisuke Goto, Hubert Rady, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ron Harvey Jr, Jacob Gerke, Alex Yan

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References:
http://humanorigins.si.edu/evi....dence/human-fossils/
http://humanorigins.si.edu/evi....dence/human-fossils/
Alperson-Afil, N. (2008). Continual fire-making by hominins at Gesher Benot Ya ‘aqov, Israel. Quaternary Science Reviews, 27(17-18), 1733-1739.
Barkai, R., Rosell, J., Blasco, R., & Gopher, A. (2017). Fire for a reason: Barbecue at middle Pleistocene Qesem cave, Israel. Current Anthropology, 58(S16), S314-S328.
Berna, F., Goldberg, P., Horwitz, L. K., Brink, J., Holt, S., Bamford, M., & Chazan, M. (2012). Microstratigraphic evidence of in situ fire in the Acheulean strata of Wonderwerk Cave, Northern Cape province, South Africa. Proceedings of the National Academy of Sciences, 109(20), E1215-E1220.
Blain, H. A., Agustí, J., Lordkipanidze, D., Rook, L., & Delfino, M. (2014). Paleoclimatic and paleoenvironmental context of the Early Pleistocene hominins from Dmanisi (Georgia, Lesser Caucasus) inferred from the herpetofaunal assemblage. Quaternary science reviews, 105, 136-150.
Carmody, R. N., & Wrangham, R. W. (2009). The energetic significance of cooking. Journal of Human Evolution, 57(4), 379-391.
Clark, J. D., & Harris, J. W. (1985). Fire and its roles in early hominid lifeways. African Archaeological Review, 3(1), 3-27.
Gowlett, J. A. (2016). The discovery of fire by humans: a long and convoluted process. Philosophical Transactions of the Royal Society B: Biological Sciences, 371(1696), 20150164.
Gowlett, J. A., & Wrangham, R. W. (2013). Earliest fire in Africa: towards the convergence of archaeological evidence and the cooking hypothesis. Azania: Archaeological Research in Africa, 48(1), 5-30.
Hlubik, S., Berna, F., Feibel, C., Braun, D., & Harris, J. W. (2017). Researching the nature of fire at 1.5 Mya on the site of FxJj20 AB, Koobi Fora, Kenya, using high-resolution spatial analysis and FTIR spectrometry. Current Anthropology, 58(S16), S243-S257.
MacDonald, K. (2017). The use of fire and human distribution. Temperature, 4(2), 153-165.
Pruetz, J. D., & LaDuke, T. C. (2010). Brief communication: Reaction to fire by savanna chimpanzees (Pan troglodytes verus) at Fongoli, Senegal: Conceptualization of “fire behavior” and the case for a chimpanzee model. American Journal of Physical Anthropology: The Official Publication of the American Association of Physical Anthropologists, 141(4), 646-650.
Roebroeks, W., & Villa, P. (2011). On the earliest evidence for habitual use of fire in Europe. Proceedings of the National Academy of Sciences, 108(13), 5209-5214.
Zink, K. D., & Lieberman, D. E. (2016). Impact of meat and Lower Palaeolithic food processing techniques on chewing in humans. Nature, 531(7595), 500.

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In order to understand where hearts came from, we have to go back to the earliest common ancestor of everything that has a heart. It took hundreds of millions of years, and countless different iterations of the same basic structure to lead to the heart that you have today.

Thanks as always to Nobu Tamura for allowing us to use his wonderful paleoart: http://spinops.blogspot.com/

Thanks to Ceri Thomas for the Ichthyostega 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, Anthony Callaghan, Larry Wilson, Merri Snaidman, Renzo Caimi Ordenes, John Vanek, Neil H. Gray, Marilyn Wolmart, Esmeralda Rupp-Spangle, Gregory Donovan, Ehit Dinesh Agarwal, سلطان الخليفي, Gabriel Cortez, Marcus Lejon, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman, Betsy Radley, PS, Colin Sylvester, Philip Slingerland, Jose Garcia, 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, Daisuke Goto, Hubert Rady, Yuntao Zhou, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ron Harvey Jr, Jacob Gerke, Alex Yan

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References:
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC53784
https://link.springer.com/arti....cle/10.1007%2Fs00018
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC26142
https://onlinelibrary.wiley.co....m/doi/abs/10.1111/j.
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC30974
https://www.nature.com/articles/ncomms4560
http://www.nhm.ac.uk/discover/....news/2014/april/earl
http://www.sci-news.com/paleon....tology/science-fossi
https://journals.plos.org/plos....one/article?id=10.13
https://www.ncbi.nlm.nih.gov/pubmed/7915669
https://www.ncbi.nlm.nih.gov/pubmed/10355031
https://genent.cals.ncsu.edu/b....ug-bytes/circulatory
https://onlinelibrary.wiley.co....m/doi/full/10.1111/b
http://www.fossilmuseum.net/Fo....ssil_Sites/whitesea/
http://www.tulane.edu/~bfleury..../diversity/labguide/
https://academic.oup.com/mollu....s/article-abstract/4
https://circsystems.weebly.com/mollusca.html
https://www.britannica.com/ani....mal/mollusk/Evolutio
https://onlinelibrary.wiley.co....m/doi/full/10.1111/j
https://www.thoughtco.com/evol....ution-of-the-human-h
https://www.sciencedirect.com/....science/article/pii/
https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC44596
https://www.ncbi.nlm.nih.gov/pubmed/28905992

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The mammoths fossils found on the Channel Islands off the coast of southern California are much smaller than their relatives found on the mainland. They were so small that they came to be seen as their own species. How did they get there? And why were they so small?

Thanks to Ceri Thomas for the mammoth reconstructions throughout this episode. Check out more of Ceri's paleoart at http://alphynix.tumblr.com and http://nixillustration.com

Thanks to Julio Lacerda and Studio 252mya for the Palaeoloxodon illustrations. You can find more of Julio's work here: https://252mya.com/gallery/julio-lacerda

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, Anthony Callaghan, Larry Wilson, Merri Snaidman, Renzo Caimi Ordenes, John Vanek, Neil H. Gray, Marilyn Wolmart, Esmeralda Rupp-Spangle, Gregory Donovan, Ehit Dinesh Agarwal, سلطان الخليفي, Gabriel Cortez, Marcus Lejon, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman, Betsy Radley, PS, Colin Sylvester, Philip Slingerland, Jose Garcia, 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, Daisuke Goto, Hubert Rady, Yuntao Zhou, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ron Harvey Jr, Jacob Gerke, Alex Yan

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References:
http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1940&context=usgsstaffpub
https://www.nhm-wien.ac.at/jar....t/prj3/nhm/data/uplo
https://www.researchgate.net/p....ublication/288262862
“Extreme expansion of the olfactory receptor gene repertoire in African elephants and evolutionary dynamics of orthologous gene groups in 13 placental mammals.” Niimura Y, Matsui A, Touhara K. 2014.
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http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.541.6488&rep=rep1&type=pdf
Evolution of Island Mammals: Adaptation and Extinction of Placental Mammals on Islands by Alexandra van der Geer, George Lyras, John de Vos and Michael Dermitzakis.
Niimura Y, Matsui A, Touhara K. 2014. Extreme expansion of the olfactory receptor gene repertoire in African elephants and evolutionary dynamics of orthologous gene groups in 13 placental mammals. Genome Res doi: 10.1101/gr.169532.113
https://www.nhm-wien.ac.at/jar....t/prj3/nhm/data/uplo
"Sea level, paleogeography, and archeology on California's Northern
Channel Islands," by Reeder-Myers et al. 2015.
https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1940&context=usgsstaffpub
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https://www.sciencedirect.com/....science/article/pii/
http://natural-history.uoregon.....edu/research/paleoc
https://www.nhm-wien.ac.at/jar....t/prj3/nhm/data/uplo
https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1940&context=usgsstaffpub

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Ratites have spread to Africa, Australia, New Zealand, and South America. And there are fossils of Ratites in Europe, Asia, and North America too. That’s a lot of ground to cover for birds that can’t fly. So how did Ratites end up all over the world?

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

Thanks as always to Nobu Tamura for allowing us to use his wonderful paleoart: http://spinops.blogspot.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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References:
http://www.pnas.org/content/ea....rly/2014/03/14/13149
https://researchcommons.waikat....o.ac.nz/handle/10289
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https://www.jstor.org/stable/2462941
https://onlinelibrary.wiley.co....m/doi/abs/10.1002/jm

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With its lizard-like appearance and that distinctive sail on it back, Dimetrodon is practically the mascot of the Palaeozoic Era, a time before flowers, birds, mammals, and even crocodiles. But if you take a close look at this sail-backed animal, you might see a little bit of yourself.

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Thanks to Franz Anthony and Studio 252mya for the Dimetrodon illustration. You can find more of Franz's work here: https://252mya.com/gallery/franz-anthony

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References:
https://evolution-outreach.spr....ingeropen.com/articl
http://www.app.pan.pl/article/....item/app20100039.htm
http://www.tandfonline.com/doi..../abs/10.1080/1042094
http://www.journals.uchicago.e....du/doi/10.1086/65300
http://onlinelibrary.wiley.com..../doi/10.1002/jmor.10

Viewers like you help make PBS (Thank you

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Temnospondyls were a huge group of amphibians that existed for 210 million years. And calling them ‘diverse’ would be putting it mildly. Yet in the end, two major threats would push them to extinction: the always-changing climate and the amniote egg.

Thanks to Ceri Thomas for the very cool Temnospondyl reconstructions throughout this episode. Check out more of Ceri's paleoart at http://alphynix.tumblr.com and http://nixillustration.com

And thanks as always to Nobumichi Tamura for allowing us to use his wonderful paleoart: http://spinops.blogspot.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, 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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Want to follow Eons elsewhere on the internet?
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References:
Gaining Ground: The Origin and Evolution of Tetrapods, Second Edition by Jennifer A. Clack.
The Rise of Amphibians: 365 Million Years of Evolution by Robert Carroll.
Amphibian Evolution: The Life of Early Land Vertebrates by Rainer R. Schoch.
Earth Before the Dinosaurs by Sebastian Steyer.
How Vertebrates Left the Water by Michel Laurin.
The Late Triassic World: Earth in a Time of Transition, edited by Lawrence H. Tanner.
The Story of Life in 25 Fossils: Tales of Intrepid Explorers and the Wonders of Evolution by Donald R. Prothero.
http://rspb.royalsocietypublis....hing.org/content/281
https://academic.oup.com/zooli....nnean/article/150/4/
https://www.researchgate.net/p....ublication/256496340
“Fishes and Amphibians From the Late Permian Pedra De Fogo Formation of Northern Brazil” by Cox and Barry, 1991.
https://www.jstor.org/stable/4524569
“Lower Triassic Temnospondyli of Tasmania” by Cogsgriff, 1974.
https://onlinelibrary.wiley.co....m/doi/pdf/10.1111/j.
https://www.researchgate.net/p....ublication/281863720
https://www.tandfonline.com/do....i/abs/10.1080/027246
https://onlinelibrary.wiley.co....m/doi/abs/10.1111/j.

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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
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http://haplogroup-a.com/Ancient-Root-AJHG2013.pdf
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https://www.ncbi.nlm.nih.gov/p....mc/articles/PMC43815
https://www.ncbi.nlm.nih.gov/pubmed/28086175

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Check out Origin of Everything: https://www.youtube.com/channe....l/UCiB8h9jD2Mlxx96ZF

Today, our closest evolutionary relatives, the apes, live only in small pockets of Africa and Asia. But back in the Miocene epoch, apes occupied all of Europe. Why aren’t there wild apes in Europe today?

Special thanks to https://AfricanFossils.org for allowing us to use their images of Proconsul and Ekembo fossils.

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, Anthony Callaghan, Neil H. Gray, Marilyn Wolmart, Esmeralda Rupp-Spangle, Gregory Donovan, Ehit Dinesh Agarwal, سلطان الخليفي, 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, 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://anthropology.utoronto.....ca/Faculty/Begun/beg
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http://science.sciencemag.org/content/327/5965/532
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https://pdfs.semanticscholar.o....rg/88f2/1ff1b2196d32
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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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References:

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The California condor is the biggest flying bird in North America, a title that it has held since the Late Pleistocene Epoch. It's just one example of an organism that we share the planet with today that seems lost in time, out of place in our world.

Thanks as always to Studio 252mya for their wonderful paleoart. You can check out more of their work here: https://252mya.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, Anthony Callaghan, XULIN GE, Po Foon Kwong, Larry Wilson, Merri Snaidman, Renzo Caimi, Ordenes, John Vanek, Neil H. Gray, Marilyn Wolmart, Esmeralda Rupp-Spangle, Gregory Donovan, Ehit Dinesh Agarwal, الخليفي سلطان, Gabriel Cortez, Marcus Lejon, Robert Arévalo, Robert Hill, Kelby Reid, Todd Dittman, Betsy Radley, PS, Philip Slingerland, Jose Garcia, 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, Daisuke Goto, Hubert Rady, Gregory Kintz, Tyson Cleary, Chandler Bass, Maly Lor, Joao Ascensao, Tsee Lee, Sarah Fritts, Ron Harvey Jr, Jacob Gerke, Alex Yan

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References: https://bit.ly/2HdL2V7