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Laili (cave)
Laili is a limestone cave located near the town of Laleia, Manatuto District, East Timor. Archeological findings in Laili provide evidence that the cave was occupied by Human, modern humans 44,600 years ago, making it the second oldest known such habitation in Wallacea aside from Madjedbebe in mainland Northern Australia. The age of findings made in Laili corroborates the theory that humans spread from Asia to Australia through the Southern route, via Java and the Lesser Sunda Islands. Location Today, the cave lies at an altitude of . 44,600 years ago, during initial settlement, the sea level was lower than today. During the Last Glacial Maximum, about 20,000 years ago, the sea level was lower than today. The steepness of the shore near Laili means that the distance from the cave to the shore has stayed relatively unchanged over time, from during the peak of the glacial era to today. Occupation Findings from the cave provide evidence for occupation spanning 44,600 to 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manatuto District
Manatuto (, ) is one of the municipalities (formerly districts) of East Timor, located in the central part of the country. It has a population of 45,541 (Census 2010) and an area of 1,783.3 km². The capital of the municipality is also named Manatuto. It is the least populated municipality of East Timor. Etymology The word ''Manatuto'' has been said to be a Portuguese approximation of the local Tetum and Galoli language word ''Manatutu'', which means 'pecking birds'. According to another source, the word is a portmanteau of the Tetum words ''Mana'' and ''tutu'', which mean 'old woman' and 'peak' or 'summit', respectively. The legend goes that two groups of people were each living on the summit of a hill, one of them named Sau Raha (now Soraha) and the other Sau Lor (now Saulidun). The two groups were engaged separately in their own daily activities, but each was accompanied by one of two Liurai, who were brothers. Geography The borders of the municipality of Manatuto a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Timor
East Timor (), also known as Timor-Leste (), officially the Democratic Republic of Timor-Leste, is an island country in Southeast Asia. It comprises the eastern half of the island of Timor, the exclave of Oecusse on the island's north-western half, and the minor islands of Atauro and Jaco. Australia is the country's southern neighbour, separated by the Timor Sea. The country's size is . Dili is its capital and largest city. East Timor came under Portuguese influence in the sixteenth century, remaining a Portuguese colony until 1975. Internal conflict preceded a unilateral declaration of independence and an Indonesian invasion and annexation. Resistance continued throughout Indonesian rule, and in 1999 a United Nations–sponsored act of self-determination led to Indonesia relinquishing control of the territory. On 20 May 2002, as ''Timor-Leste'', it became the first new sovereign state of the 21st century. The national government runs on a semi-presidential system, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Human
Humans (''Homo sapiens'') are the most abundant and widespread species of primate, characterized by bipedalism and exceptional cognitive skills due to a large and complex brain. This has enabled the development of advanced tools, culture, and language. Humans are highly social and tend to live in complex social structures composed of many cooperating and competing groups, from families and kinship networks to political states. Social interactions between humans have established a wide variety of values, social norms, and rituals, which bolster human society. Its intelligence and its desire to understand and influence the environment and to explain and manipulate phenomena have motivated humanity's development of science, philosophy, mythology, religion, and other fields of study. Although some scientists equate the term ''humans'' with all members of the genus ''Homo'', in common usage, it generally refers to ''Homo sapiens'', the only extant member. Anatomically moder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wallacea
Wallacea is a biogeographical designation for a group of mainly Indonesian islands separated by deep-water straits from the Asian and Australian continental shelves. Wallacea includes Sulawesi, the largest island in the group, as well as Lombok, Sumbawa, Flores, Sumba, Timor, Halmahera, Buru, Seram, and many smaller islands. The islands of Wallacea lie between the Sunda Shelf (the Malay Peninsula, Sumatra, Borneo, Java, and Bali) to the west, and the Sahul Shelf including Australia and New Guinea to the south and east. The total land area of Wallacea is . Geography Wallacea is defined as the series of islands stretching between the two continental shelves of Sunda and Sahul, but excluding the Philippines. Its eastern border (separating Wallacea from Sahul) is represented by a zoogeographical boundary known as Lydekker's Line, while the Wallace Line (separating Wallacea from Sunda) defines its western border. The Weber Line is the midpoint, at which Asian and Australian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madjedbebe
Madjedbebe (formerly known as Malakunanja II) is a sandstone rock shelter in Arnhem Land, in the Northern Territory of Australia, said to be the site of the oldest evidence of human habitation in the country. It is located about from the coast. It is part of the lands traditionally inhabited by the Mirarr, an Aboriginal Australian clan of the Gaagudju people, of the Gunwinyguan language group. Although it is surrounded by the World Heritage Listed Kakadu National Park, Madjedbebe itself is located within the Jabiluka Mineral Leasehold. Archaeological findings Madjedbebe is the oldest known site showing the presence of humans in Australia. Archaeological excavations conducted by Clarkson et al. (2017) yielded evidence to suggest that Madjedbebe was first occupied by humans possibly by 65,000 +/- 6,000 years ago and at least by 50,000 years ago. While the age of 50,000 years ago has been widely accepted since the 1990s, this latter estimate (of ca. 65,000 years ago) has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lesser Sunda Islands
The Lesser Sunda Islands or nowadays known as Nusa Tenggara Islands ( id, Kepulauan Nusa Tenggara, formerly ) are an archipelago in Maritime Southeast Asia, north of Australia. Together with the Greater Sunda Islands to the west they make up the Sunda Islands. The islands are part of a volcanic arc, the Sunda Arc, formed by subduction along the Sunda Trench in the Java Sea. A bit more than 20 million people live on the islands. Etymologically, Nusa Tenggara means "Southeast Islands" from the words of ''nusa'' which means 'island' from Old Javanese language and ''tenggara'' means 'southeast'. The main Lesser Sunda Islands are, from west to east: Bali, Lombok, Sumbawa, Flores, Sumba, Savu, Rote, Timor, Atauro, Alor archipelago, Barat Daya Islands, and Tanimbar Islands. Geology The Lesser Sunda Islands consist of two geologically distinct archipelagos.Audley-Charles, M.G. (1987) "Dispersal of Gondwanaland: relevance to evolution of the Angiosperms" ''In'': Whitmore, T.C. ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Last Glacial Maximum
The Last Glacial Maximum (LGM), also referred to as the Late Glacial Maximum, was the most recent time during the Last Glacial Period that ice sheets were at their greatest extent. Ice sheets covered much of Northern North America, Northern Europe, and Asia and profoundly affected Earth's climate by causing drought, desertification, and a large drop in sea levels. Based on changes in position of ice sheet margins dated via terrestrial cosmogenic nuclides and radiocarbon dating, growth of ice sheets commenced 33,000 years ago and maximum coverage was between 26,500 years and 19–20,000 years ago, when deglaciation commenced in the Northern Hemisphere, causing an abrupt rise in sea level. Decline of the West Antarctica ice sheet occurred between 14,000 and 15,000 years ago, consistent with evidence for another abrupt rise in the sea level about 14,500 years ago. Glacier fluctuations around the Strait of Magellan suggest the peak in glacial surface area was constrained to betwee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muridae
The Muridae, or murids, are the largest family of rodents and of mammals, containing approximately 1,383 species, including many species of mice, rats, and gerbils found naturally throughout Eurasia, Africa, and Australia. The name Muridae comes from the Latin ' (genitive '), meaning "mouse", since all true mice belong to the family, with the more typical mice belonging to the genus '' Mus''. Distribution and habitat Murids are found nearly everywhere in the world, though many subfamilies have narrower ranges. Murids are not found in Antarctica or many oceanic islands. Although none of them are native to the Americas, a few species, notably the house mouse and black rat, have been introduced worldwide. Murids occupy a broad range of ecosystems from tropical forests to tundras. Fossorial, arboreal, and semiaquatic murid species occur, though most are terrestrial animals. The extensive list of niches filled by murids helps to explain their relative abundance. Diet and dentiti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jerimalai
Jerimalai is a limestone cave southeast of Tutuala, on the eastern tip of East Timor. Fish remains and fish hooks excavated in Jerimalai provide evidence for advanced fishing technique by inhabitants of Timor 42,000 years ago. Jerimalai has the third oldest findings discovered in Wallacea, after Madjedbebe in mainland Northern Australia and the Laili (cave), Laili cave near Manatuto on Timor. Location The cave lies at an altitude of 75 m, less than a kilometer from the sea. 42,000 years ago, the sea was 55 m lower than in 2016, and the cave was 2.8 km from the sea. 22,000 years ago, during the Last Glacial Maximum, the sea level was 121 m lower than in 2016 and Jerimalai was 3.5 km from the shore. During the glacial age, the descent from the cave to the coastline was much steeper, which explains why the cave was little used at that time. Findings Background Since 2005, several archaeological findings dating back more than 42,000 years have been made in the ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek grc, label=none, πλεῖστος, pleīstos, most and grc, label=none, καινός, kainós (latinized as ), 'new'. At the end of the preceding Pliocene, the previously isolated North and South American continents were joined by the Isthmus of Panama, causing Great American Interchang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiocarbon Dating
Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. The method was developed in the late 1940s at the University of Chicago by Willard Libby. It is based on the fact that radiocarbon () is constantly being created in the Earth's atmosphere by the interaction of cosmic rays with atmospheric nitrogen. The resulting combines with atmospheric oxygen to form radioactive carbon dioxide, which is incorporated into plants by photosynthesis; animals then acquire by eating the plants. When the animal or plant dies, it stops exchanging carbon with its environment, and thereafter the amount of it contains begins to decrease as the undergoes radioactive decay. Measuring the amount of in a sample from a dead plant or animal, such as a piece of wood or a fragment of bone, provides information that can be used to calc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
