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Who We Are And How We Got Here
''Who We Are and How We Got Here'' is a 2018 book on the contribution of genome-wide ancient DNA research to human population genetics by the geneticist David Reich. He describes discoveries made by his group and others, based on analysis and comparison of ancient and modern DNA from human populations around the world. Central to these is the finding that almost all human populations are mixtures resulting from multiple population migrations and gene flow. Several reviewers have praised the book for clearly describing pioneering work in a cutting-edge field of study. It has been criticized by numerous scientists and scholars for its handling of race, though other commentators observe that nothing it says should give racists any comfort. Context David Reich is a geneticist who has studied ancient human genomes, comparing their patterns of mutations to discover which populations migrated and mixed throughout prehistory. He was mentored by the population geneticist Luca Caval ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Reich (geneticist)
David Emil Reich (born July 14, 1974) is an American geneticist known for the industrialization of research into the population genetics of ancient humans, including their migrations and the mixing of populations, discovered by analysis of genome-wide patterns of mutations. He is professor in the department of genetics at the Harvard Medical School, and an associate of the Broad Institute. Reich was highlighted as one of Nature's 10 for his contributions to science in 2015. He received the Dan David Prize in 2017, the NAS Award in Molecular Biology, the Wiley Prize, and the Darwin–Wallace Medal in 2019. In 2021 he was awarded the Massry Prize. He is the director of the David Reich Lab. Early life and education Reich grew up as part of a Jewish family in Washington, D.C. His parents are novelist Tova Reich (sister of Rabbi Avi Weiss) and Walter Reich, a professor at George Washington University, who served as the first director of the United States Holocaust Memoria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancient DNA Revolution
Ancient DNA (aDNA) is DNA isolated from ancient sources (typically specimens, but also environmental DNA). Due to degradation processes (including cross-linking, deamination and fragmentation) ancient DNA is more degraded in comparison with present-day genetic material. Genetic material has been recovered from paleo/archaeological and historical skeletal material, mummified tissues, archival collections of non-frozen medical specimens, preserved plant remains, ice and from permafrost cores, marine and lake sediments and excavation dirt. Even under the best preservation conditions, there is an upper boundary of 0.4–1.5 million years for a sample to contain sufficient DNA for sequencing technologies. The oldest DNA sequenced from physical specimens are from mammoth molars in Siberia over 1 million years old. In 2022, two-million-year-old genetic material was recovered from sediments in Greenland, and is currently considered the oldest DNA discovered so far. History of ancien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeology
Archaeology or archeology is the study of human activity through the recovery and analysis of material culture. The archaeological record consists of Artifact (archaeology), artifacts, architecture, biofact (archaeology), biofacts or ecofacts, archaeological site, sites, and cultural landscapes. Archaeology can be considered both a social science and a branch of the humanities. It is usually considered an independent academic discipline, but may also be classified as part of anthropology (in North America – the four-field approach), history or geography. The discipline involves Survey (archaeology), surveying, Archaeological excavation, excavation, and eventually Post excavation, analysis of data collected, to learn more about the past. In broad scope, archaeology relies on cross-disciplinary research. Archaeologists study human prehistory and history, from the development of the first stone tools at Lomekwi in East Africa 3.3 million years ago up until recent decades. A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corded Ware
The Corded Ware culture comprises a broad archaeological horizon of Europe between – 2350 BC, thus from the Late Neolithic, through the Copper Age, and ending in the early Bronze Age. Corded Ware culture encompassed a vast area, from the contact zone between the Yamnaya culture and the Corded Ware culture in south Central Europe, to the Rhine in the west and the Volga in the east, occupying parts of Northern Europe, Central Europe and Eastern Europe. Autosomal genetic studies suggest that the Corded Ware culture originated from the westward migration of Yamnaya-related people from the steppe-forest zone into the territory of late Neolithic European cultures, evolving in parallel with (although under significant influence from) the Yamnaya; while the idea of direct male-line descent between them has not received significant support yet, IBD-sharing between the populations of these two cultures indicates that, at the very least, they came from a recent common ancestor, wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caspian Sea
The Caspian Sea is the world's largest inland body of water, described as the List of lakes by area, world's largest lake and usually referred to as a full-fledged sea. An endorheic basin, it lies between Europe and Asia: east of the Caucasus, west of the broad steppe of Central Asia, south of the fertile plains of Southern Russia in Eastern Europe, and north of the mountainous Iranian Plateau. It covers a surface area of (excluding the highly saline lagoon of Garabogazköl to its east), an area approximately equal to that of Japan, with a volume of . It has a salinity of approximately 1.2% (12 g/L), about a third of the salinity of average seawater. It is bounded by Kazakhstan to the northeast, Russia to the northwest, Azerbaijan to the southwest, Iran to the south, and Turkmenistan to the southeast. The name of the Caspian Sea is derived from the ancient Iranian peoples, Iranic Caspians, Caspi people. The sea stretches from north to south, with an average width of . Its gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Sea
The Black Sea is a marginal sea, marginal Mediterranean sea (oceanography), mediterranean sea lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bounded by Bulgaria, Georgia (country), Georgia, Romania, Russia, Turkey, and Ukraine. The Black Sea is Inflow (hydrology), supplied by major rivers, principally the Danube, Dnieper and Dniester. Consequently, while six countries have a coastline on the sea, its drainage basin includes parts of 24 countries in Europe. The Black Sea, not including the Sea of Azov, covers , has a maximum depth of , and a volume of . Most of its coasts ascend rapidly. These rises are the Pontic Mountains to the south, bar the southwest-facing peninsulas, the Caucasus Mountains to the east, and the Crimean Mountains to the mid-north. In the west, the coast is generally small floodplains below foothills such as the Strandzha; Cape Emine, a dwindling of the east end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steppe
In physical geography, a steppe () is an ecoregion characterized by grassland plains without closed forests except near rivers and lakes. Steppe biomes may include: * the montane grasslands and shrublands biome * the tropical and subtropical grasslands, savannas, and shrublands biome * the temperate grasslands, savannas, and shrublands biome A steppe is usually covered with grass and shrubs, depending on the season and latitude. The term ''steppe climate'' denotes a semi-arid climate, which is encountered in regions too dry to support a forest, but not dry enough to be a desert. Steppes are usually characterized by a semi-arid or continental climate. Temperature extremes can be recorded in the summer of up to and in winter of down to . Besides this major seasonal difference, fluctuations between day and night are also significant: in both the highlands of Mongolia and northern Nevada, can be reached during the day with sub-freezing readings at night. Steppes ave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yamnaya
The Yamnaya ( ) or Yamna culture ( ), also known as the Pit Grave culture or Ochre Grave culture, is a late Copper Age to early Bronze Age archaeological culture of the region between the Southern Bug, Dniester, and Ural rivers (the Pontic–Caspian steppe), dating to 3300–2600 BC. It was discovered by Vasily Gorodtsov following his archaeological excavations near the Donets River in 1901–1903. Its name derives from its characteristic burial tradition: () is a Russian adjective that means (), as these people buried their dead in tumuli ( kurgans) containing simple pit chambers. Research in recent years has found that Mykhailivka, on the lower Dnieper River, Ukraine, formed the core Yamnaya culture (c. 3600–3400 BC). The Yamnaya culture is of particular interest to archaeologists and linguists, as the widely accepted Kurgan hypothesis posits that the people who produced the Yamnaya culture spoke a stage of the Proto-Indo-European language. The speakers of the P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indo-European Languages
The Indo-European languages are a language family native to the northern Indian subcontinent, most of Europe, and the Iranian plateau with additional native branches found in regions such as Sri Lanka, the Maldives, parts of Central Asia (e.g., Tajikistan and Afghanistan), Armenia, and areas of southern India. Historically, Indo-European languages were also spoken in Anatolia. Some European languages of this family—English language, English, French language, French, Portuguese language, Portuguese, Russian language, Russian, Spanish language, Spanish, and Dutch language, Dutch—have expanded through colonialism in the modern period and are now spoken across several continents. The Indo-European family is divided into several branches or sub-families, including Albanian language, Albanian, Armenian language, Armenian, Balto-Slavic, Celtic languages, Celtic, Germanic languages, Germanic, Hellenic languages, Hellenic, Indo-Iranian languages, Indo-Iranian, and Italic languages, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancient Greek
Ancient Greek (, ; ) includes the forms of the Greek language used in ancient Greece and the classical antiquity, ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Greek Dark Ages, Dark Ages (), the Archaic Greece, Archaic or Homeric Greek, Homeric period (), and the Classical Greece, Classical period (). Ancient Greek was the language of Homer and of fifth-century Athens, fifth-century Athenian historians, playwrights, and Ancient Greek philosophy, philosophers. It has contributed many words to English vocabulary and has been a standard subject of study in educational institutions of the Western world since the Renaissance. This article primarily contains information about the Homeric Greek, Epic and Classical periods of the language, which are the best-attested periods and considered most typical of Ancient Greek. From the Hellenistic period (), Ancient Greek was followed by Koine Greek, which is regar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sanskrit
Sanskrit (; stem form ; nominal singular , ,) is a classical language belonging to the Indo-Aryan languages, Indo-Aryan branch of the Indo-European languages. It arose in northwest South Asia after its predecessor languages had Trans-cultural diffusion, diffused there from the northwest in the late Bronze Age#South Asia, Bronze Age. Sanskrit is the sacred language of Hinduism, the language of classical Hindu philosophy, and of historical texts of Buddhism and Jainism. It was a lingua franca, link language in ancient and medieval South Asia, and upon transmission of Hindu and Buddhist culture to Southeast Asia, East Asia and Central Asia in the early medieval era, it became a language of religion and high culture, and of the political elites in some of these regions. As a result, Sanskrit had a lasting effect on the languages of South Asia, Southeast Asia and East Asia, especially in their formal and learned vocabularies. Sanskrit generally connotes several Indo-Aryan languages# ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sir William Jones
Sir William Jones (28 September 1746 – 27 April 1794) was a British philologist, orientalist, Indologist and judge. Born in Westminster, London to Welsh mathematician William Jones, he moved to the Bengal Presidency where Jones served as a puisne judge on the Supreme Court of Judicature at Fort William and also became a scholar of ancient Indian history. As part of his research, he was the first to assert the kinship of the Indo-European languages. Jones also founded the Asiatic Society in Calcutta in 1784. Early life William Jones was born in London; his father William Jones (1675–1749) was a mathematician from Anglesey in Wales, noted for introducing the use of the symbol π. The young William Jones was a linguistic prodigy, who in addition to his native languages English and Welsh, learned Greek, Latin, Persian, Arabic, Hebrew and the basics of Chinese writing at an early age. By the end of his life, he knew eight languages with critical thoroughness. Jones's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
