Science, Tech, Engineering and Math

The Perfect Black According to Science
The Perfect Black According to Science Shabaka 22 Views • 2 years ago

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Electromagnetic Radiation, Light, Thermal Radiation, Incandescence, White Light, Laser, Refraction, Prism, Additive Color, Subtractive Color, Damballah, Ayida Weddo, rainbow serpent, Oshunmare, Spectralon, Whitest White, White Body, Black 2.0, Black 3.0, Super Black, Vantablack, Vertically Aligned Carbon Nanotube Arrays, Blackest Black, Black Body, Lord of the Perfect Black, Kem-ur, Kem-wer, The Great Black One, Ausar, Osiris

When We Tamed Fire
When We Tamed Fire Kwabena Ofori Osei 22 Views • 2 years ago

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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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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.

From the Fall of the Dinosaurs to the Rise of Humans
From the Fall of the Dinosaurs to the Rise of Humans Kwabena Ofori Osei 30 Views • 2 years ago

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Check out our other journeys through geologic time here :
https://www.youtube.com/playli....st?list=PLi6K9w_UbfF

After taking you on a journey through geologic time, we've arrived at the Cenozoic Era. Most of the mammals and birds that you can think of appeared during this era but perhaps more importantly, the Cenozoic marks the rise of organisms that look a lot like us.

Thanks to Sean Murtha for the wonderful illustration of Tsidiiyazhi. Check out more of Sean's work here: http://www.seanmurthaart.com

And thanks to Ceri Thomas for the very cool Titanoboa reconstruction. Check out more of Ceri's paleoart at http://alphynix.tumblr.com and http://nixillustration.com

And as always thanks to Nobumichi Tamura for allowing us to use his wonderful paleoart: http://spinops.blogspot.com/

Thanks to Studio 252mya for their illustrations. You can find more of their work here: https://252mya.com/licensing

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References:
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Where Did Our Moon Come From? || When Earth "Ate" A Planet
Where Did Our Moon Come From? || When Earth "Ate" A Planet Kwabena Ofori Osei 46 Views • 2 years ago

Where did our unique moon come from? It turns out that lunar rocks brought back by Apollo astronauts are a clue, pointing to the origin of our closest cosmic companion, an origin even stranger than you might imagine… Find out more about our Prehistoric Elephants here: https://complexly.info/mammoths*****PBS Member Stations rely on viewers like you. To support your local station, go to http://to.pbs.org/DonateEons*****Eons is a production of Complexly for PBS Digital Studios.Super special thanks to the following Patreon patrons for helping make Eons possible:Randall George, Morgan, Kevin Lacson, Marco Narajos, Collin Dutrow, Pope John XII, Aaditya Mehta, AllPizzasArePersonal, John H. Austin, Jr., Alex Hackman, Stephen Patterson, Odditeas , Karen Farrell, Jason Rostoker, Jonathan Rust, Mary Tevington, Bart & Elke van Iersel - De Jong, Irene Wood, Derek Helling, Mark Talbott-Williams, Nomi Alchin, Duane Westhoff, Hillary Ryde-Collins, Yu Mei, Albert Folsom, Heathe Kyle Yeakley, Dan Caffee, Nick Ryhajlo, Jeff GrahamIf you'd like to support the channel, head over to http://patreon.com/eons and pledge for some cool rewards!Want to follow Eons elsewhere on the internet?Facebook - https://www.facebook.com/eonsshowTwitter - https://twitter.com/eonsshowInstagram - https://www.instagram.com/eons....show/#EonsReferences

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