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Σάββατο, 16 Μαρτίου 2013

What the Ancient Greeks did for us

English: Locator map depicting the ancient Gre...
English: Locator map depicting the ancient Greek world, c. 550 BC (Photo credit: Wikipedia)

Uploaded on Dec 11, 2011
The ancient Greek civilisation flourished for about a thousand years, not as a unified country but rather as a loose association of city states, both on the mainland of Greece and elsewhere around the Mediterranean. The philosopher Plato described the states as being like a series of frogs sitting around a pond. Although the Greeks drew on the ideas of various earlier civilisations, they were the people who, more than any other, handed down to us the foundations of our democracy, our notions of ethics and justice, our science, our mathematics and our music.

But perhaps their most amazing invention is the first known computer. This was a small box stuffed with cogs and moving parts all skilfully made and by turning a handle it would display the movements of planets to an astonishing degree of accuracy -in fact it was a planetarium.

Παρασκευή, 15 Μαρτίου 2013

Η αόρατη γεωμετρία στην αρχαία Ελλάδα- http://www.projethomere.com

English: Temple of Hephaestus (Theseion), Anci...
English: Temple of Hephaestus (Theseion), Ancient Agora, Athens, Greece. Ελληνικά: Ναός του Ηφαίστου (Θησείο), Αρχαία Αγορά, Αθήνα, Ελλάδα. (Photo credit: Wikipedia)
Published on Apr 22, 2012
Η αόρατη γεωμετρία και αρμονία στην αρχαία Ελλάδα- Ολόκληρο το ντοκιμαντέρ

What the ancients knew - Greece- http://www.projethomere.com

Herm of Dionysos with Fresco Filter applied Gr...
Herm of Dionysos with Fresco Filter applied Greek made in Asia Minor 100-50 BCE Bronze and Ivory (2) (Photo credit: mharrsch)
Published on Aug 12, 2012
What the ancients knew - Greece

Πέμπτη, 14 Μαρτίου 2013

Is Your Red The Same as My Red?

Published on Feb 17, 2013
Subscribe to Vsauce: http://bit.ly/POIaN7

All music by Jake Chudnow: http://www.youtube.com/jakechudnow

Tommy Edison (Blind guy on YouTube): http://bit.ly/rjyX7q

Color Blindness:


Qualia: http://en.wikipedia.org/wiki/Qualia

We experiences are subjective:http://en.wikipedia.org/wiki/Subjecti...

Explanatory Gap: http://en.wikipedia.org/wiki/Explanat...

Mary's Room and the Knowledge Argument:http://en.wikipedia.org/wiki/Knowledg...

Who Asked the First Question? [PDF]:http://www.polyphony.ge/uploads/whoas...

Theory of Mind and Sally-Anne Task:http://en.wikipedia.org/wiki/Theory_o...

Koko the talking gorilla [VIDEO]: http://www.youtube.com/watch?v=Pmuu8U...

Questioning Behaviour: http://en.wikipedia.org/wiki/Question

Synesthesia coupled with color blindness:http://www.scholarpedia.org/article/S...

Do blind people DREAM images?http://www2.ucsc.edu/dreams/Library/k...

Martha Muna: When Philanthropy Goes Wrong

Published on Mar 12, 2013
(May 19, 2012) Martha Muna describes her experiences working in orphanages across Ghana, outlining the downfalls of overseas charities and non-profits. She shares her efforts to find permanent families for children in orphanages, turning the facilities into schools and community centers through the Care Initiative and KaeMe.

Stanford University:

Tedx Stanford:

Stanford University Channel on YouTube:

Τρίτη, 12 Μαρτίου 2013

Greek Mythology: God and Goddesses | History Documentary

Libia, Cirene (sito archeologico), Tempio di Zeus
Libia, Cirene (sito archeologico), Tempio di Zeus (Photo credit: Wikipedia)
Greek Mythology is the body of myths and teachings that belong to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. It was a part of the religion in ancient Greece and is part of religion in modern Greece and around the world, known as Hellenismos. Modern scholars refer to and study the myths in an attempt to throw light on the religious and political institutions of Ancient Greece and its civilization, and to gain understanding of the nature of myth-making itself.[1]

Greek mythology is explicitly embodied in a large collection of narratives, and implicitly in Greek representational arts, such as vase-paintings and votive gifts. Greek myth attempts to explain the origins of the world, and details the lives and adventures of a wide variety of gods, goddesses, heroes, heroines, and mythological creatures. These accounts initially were disseminated in an oral-poetic tradition; today the Greek myths are known primarily from Greek literature.

The oldest known Greek literary sources, Homer's epic poems Iliad and Odyssey, focus on events surrounding the Trojan War. Two poems by Homer's near contemporary Hesiod, the Theogony and the Works and Days, contain accounts of the genesis of the world, the succession of divine rulers, the succession of human ages, the origin of human woes, and the origin of sacrificial practices. Myths are also preserved in the Homeric Hymns, in fragments of epic poems of the Epic Cycle, in lyric poems, in the works of the tragedians of the fifth century BC, in writings of scholars and poets of the Hellenistic Age, and in texts from the time of the Roman Empire by writers such as Plutarch and Pausanias.

Archaeological findings provide a principal source of detail about Greek mythology, with gods and heroes featured prominently in the decoration of many artifacts. Geometric designs on pottery of the eighth century BC depict scenes from the Trojan cycle as well as the adventures of Heracles. In the succeeding Archaic, Classical, and Hellenistic periods, Homeric and various other mythological scenes appear, supplementing the existing literary evidence.[2] Greek mythology has had an extensive influence on the culture, arts, and literature of Western civilization and remains part of Western heritage and language. Poets and artists from ancient times to the present have derived inspiration from Greek mythology and have discovered contemporary significance and relevance in the themes.

Κυριακή, 10 Μαρτίου 2013

The Origin of the Universe and the Arrow of Time

Google Tech Talk
August 13, 2010


Presented by Sean Carroll.

One of the most obvious facts about the universe is that the past is different from the future. We can remember yesterday, but not tomorrow; we can turn an egg into an omelet, but can't turn an omelet into an egg. That's the arrow of time, which is consistent throughout the observable universe. The arrow can be explained by assuming that the very early universe was extremely orderly, and disorder has been increasing ever since. But why did the universe start out so orderly?

I will talk about the nature of time, the origin of entropy, and how what happened before the Big Bang may be responsible for the arrow of time we observe today.

Speaker Info: Sean Carroll

I'm a theoretical physicist at Caltech in sunny Pasadena, California. My research interests include theoretical aspects of cosmology, field theory, and gravitation. I want to learn about fundamental physics by studying the structure and evolution of the universe. These days I'm especially interested in inflation, the arrow of time, and what happened at or before the Big Bang. I've done a bunch of work on dark matter and dark energy, modified gravity, topological defects, extra dimensions, and violations of fundamental symmetries.

I recently finished writing a popular-level book on cosmology and the arrow of time: From Eternity to Here: The Quest for the Ultimate Theory of Time, which I expect all of you to buy. I previously wrote a graduate textbook, Spacetime and Geometry: An Introduction to General Relativity, and recorded a set of lectures on cosmology for the Teaching Company. I started blogging back in 2004, and keep it up to this day with the help of several friends at Cosmic Variance.

Λίσα Κριστίν: Φωτογραφίες που μαρτυρούν τη σύγχρονη σκλαβιά

Τα τελευταία δύο χρόνια, η φωτογράφος Λίσα Κριστίν έχει ταξιδέψει ανά τον κόσμο, καταγράφοντας την αβάσταχτα σκληρή πραγματικότητα της σύγχρονης σκλαβιάς. Μοιράζεται βασανιστικά όμορφες φωτογραφίες -- εξορυκτές στο Κονγκό, τουβλάδες στο Νεπάλ -- ρίχνοντας φως στη συμφορά των 27 εκατομμυρίων σκλαβωμένων ψυχών παγκοσμίως. (Γυρίστηκε στο TEDxMaui) Lisa Kristine uses photography to expose deeply human

Why you should listen to her:

Lisa Kristine took an early interest in anthropology and 19th-century photographic printing techniques -- passions that have since predominated her work. In 1999, and again in 2000, she presented her photography at the State of the World Forum. In 2003, she published her first book, A Human Thread, capturing and "intimate and honest portrait of humanity." In 2007, her second book, This Moment, won the bronze metal at the Independent Publisher Book Awards. She also produced two documentary films to accompany each book -- exposing her techniques and the stories behind her photographs. In 2010, Kristine travelled the world in collaboration with Free the Slaves to document the harrowing lives of the enslaved. Slavery was published in 2010.
"Lisa Kristine’s sensitive and beautiful portrayal of isolated and distant peoples helps us to better appreciate the diversity of the world. She captures the sheer beauty of the differences in people and places and allows us to comprehend the shared nature of the human condition: its hope, its joy and its complexity."
John C. Sweeney, Director of the United Nations

Quotes by Lisa Kristine

  • “There are more than 27 million people enslaved in the world today — that's double the amount of people taken from Africa during the entire trans-Atlantic slave trade.”

Είμαι σε βάθος 45 μέτρων σ' ένα παράνομο ορυχείο στην Γκάνα. Ο αέρας είναι ζεστός κι υπάρχει σκόνη, και δυσκολεύομαι ν' αναπνεύσω. Νιώθω ιδρωμένα κορμιά να περνάνε από δίπλα μου μέσα στο σκοτάδι, αλλά δεν μπορώ να δω κάτι παραπάνω. Ακούω φωνές, αλλά κυρίως το ορυχείο συνθέτει η κακοφωνία ανδρών που βήχουν, κι ο θόρυθος απ' το σπάσιμο της πέτρας με πρωτόγονα εργαλεία. Όπως κι οι άλλοι, φοράω ένα φτηνό φακό που τρεμοφέγγει δεμένος στο κεφάλι μου μ' ένα φθαρμένο λαστιχάκι, και μετά βίας διακρίνω τα ολισθηρά κλαδιά που στηρίζουν τους τοίχους της τετράγωνης τρύπας του σχεδόν ενός μέτρου που εκτείνεται χιλιάδες μέτρα μέσα στη γη. Όταν το χέρι μου γλιστράει, ξαφνικά