This is a video lecture explaining Russell’s Paradox. At the very heart of logic and mathematics, there is a paradox that has yet to be resolved. It was discovered by the mathematician and philosopher, Bertrand Russell, in 1901. In this talk, Professor Jeffrey Kaplan teaches you the basics of set theory (a foundational branch of mathematics dating back to the 1870s) in 20 minutes. Then he explains Russell’s Paradox, which is quite a thrilling thing if you are learning it for the first time. Finally, Kaplan argues that the paradox goes even deeper than Russell himself realized. Also, I should mention Georg Cantor, Gotlob Frege, Logicism, and Zermelo–Fraenkel set theory in this description for keyword search reasons.
It has been over 20 years since DNA analysis technology began to be used in the field of archaeology. In many countries, scientists are analyzing genes from ancient human fossils and making them into a database so that they can be used for research.
Genes extracted from more than 10,000 fossils were extracted, analyzed, and compared.As a result, humans are said to have originated from a woman in Africa about 200,000 years ago.
And as a result of genetic analysis of her descendants who lived scattered around the globe, their migration routes were revealed.
In this video, their movement paths by era were mapped.
#mtDNA #MitochondrialEve #ealyman_migration #sapience
“From the halls of Montezuma, to the shores of Tripoli…” are the beginning lines from the United States Marine Corps Hymn, and the “Tripoli” that’s mentioned is the largest city in today’s Libya. The hymn was written sometime after 1867, and these lines commemorate two of the Marine Corps’ most famous battles “the halls of Montezuma referring to the Mexican-American War of 1846-48, and “the shores of Tripoli” refers to the battles the Marine Corps, along with the US Navy, fought with the infamous “Barbary Pirates” who terrorized the coast of North Africa, the Mediterranean Sea and indeed, a large part of Europe for at three centuries.
Slavery had existed in the Mediterranean Basin since before the time of Rome. During the Roman expansion, people from all corners of the empire were enslaved: Franks, Germans, Slavs, Greeks, various people from the Balkans, Africans traded to Rome by Egypt, Jews from Israel and more. Some of the richest people in Rome and the Gothic and Arab empires which followed it were slave traders. Many Viking raiders grew rich and powerful from the treasure they hoarded trading slaves. Slavery was common in Europe, the north coast of Africa, and the Middle East until relatively recent times.
The Barbary States
In the 1500s, the Ottoman Turks expanded along the North African coast. Due to distance and the fiercely independent nature of the Berbers and others, however, Ottoman control of the Barbary Coast was nominal. As long as the people there recognized the Ottoman Sultan as their overlord and gave help when it was asked, the Turks left the people of the coast alone.
One of the many interesting things about the Barbary Pirates is that, as time went on, many of them were not from the region. Many were Europeans, acting much like today’s mercenaries, looking for adventure and a quick buck. Unfortunately, what they were mainly looking for were other human being to sell into slavery.
DISCLAIMER: All materials in these videos are used for entertainment purposes and fall within the guidelines of fair use. No copyright infringement intended. If you are, or represent, the copyright owner of materials used in this video, and have an issue with the use of said material, please send an email to adayinhistory2021
DISCLAIMER: All materials in these videos are used for entertainment purposes and fall within the guidelines of fair use. No copyright infringement intended. If you are, or represent, the copyright owner of materials used in this video, and have an issue with the use of said material, please send an email to adayinhistory2021
Rarely have women in history played a more deliciously mysterious role than that of the 600 years of the Ottoman Empire, when what is modern-day Turkey and lands from the Balkans to Syria sat at the center of a great Empire. These were the days of the harem, when women – and girls as young as seven years old – were held in a secret world where they could be governed, educated, and primarily enjoyed by the sultan and his court.
The speed and magnitude of the climate change we are facing today is unprecedented. Heatwaves, droughts, floods… We are feeling its effects on our daily lives, year after year. Its impacts will increase at least until 2050 and every region of Europe will be affected.
Based on the results of the latest available studies, and in particular, on the 6th IPCC report, this film, produced by scientists in the framework of the European project EUCP, aims to present to the general public the climate changes expected in Europe in 2050. The researchers explain in an accessible way the variations in temperature and precipitation as well as the extreme climate events that European inhabitants will have to face.
This film provides the keys to understand how climate will reshape our landscapes and lifestyles over the coming decades. … and to enable us to better anticipate the need for human societies to adapt to this partly inevitable climate change.
Welcome to Transition Studies. To prosper for very much longer on the changing Earth humankind will need to move beyond its current fossil-fueled civilization toward one that is sustained on recycled materials and renewable energy. This is not a trivial shift. It will require a major transition in all aspects of our lives.
This weblog explores the transition to a sustainable future on our finite planet. It provides links to current news, key documents from government sources and non-governmental organizations, as well as video documentaries about climate change, environmental ethics and environmental justice concerns.
The links are listed here to be used in whatever manner they may be helpful in public information campaigns, course preparation, teaching, letter-writing, lectures, class presentations, policy discussions, article writing, civic or Congressional hearings and citizen action campaigns, etc. For further information on this blog see: About this weblog. and How to use this weblog.
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