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Building structures mostly used a simple beam and column system without vaults or arches, which based strict limits on the spans that could be achieved. However, the Greeks did construct some groin vaults, arch bridges and, with the Egyptians, the first high rise, the Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World.
The earliest evidence for life on Earth includes: 3.8 billion-year-old biogenic hematite in a banded iron formation of the Nuvvuagittuq Greenstone Belt in Canada; [30] graphite in 3.7 billion-year-old metasedimentary rocks in western Greenland; [31] and microbial mat fossils in 3.48 billion-year-old sandstone in Western Australia.
The first eon in Earth's history, the Hadean, begins with Earth's formation and is followed by the Archean eon at 3.8 Ga. [2]: 145 The oldest rocks found on Earth date to about 4.0 Ga, and the oldest detrital zircon crystals in rocks to about 4.4 Ga, [34] [35] [36] soon after the formation of Earth's crust and Earth itself.
Printable version; In other projects Wikidata item; ... 8000 years – the last 1000 years (fine grid) is expanded in the timeline below; 1000AD—present 1750–1900 ...
In eastern Jordan, post hole markings in the soil give evidence to houses made of poles and thatched brush around 20,000 years ago. [16] In areas where bone — especially mammoth bone — is a viable material, evidence of structures preserve much more easily, such as the mammoth-bone dwellings among the Mal'ta-Buret' culture 24–15,000 years ...
Since the chart combines secular history with biblical genealogy, it worked back from the time of Christ to peg their start at 4,004 B.C. Above the image of Adam and Eve are the words, "In the beginning God created the Heaven and the Earth" (Genesis 1:1) — beside which the author acknowledges that — "Moses assigns no date to this Creation.
The floor area of houses has also increased over the years. The median house built in 2015 had an area of about 2,467 square feet, about 62% larger than the median in 1973 of 1,525 square feet.
The following outline is provided as an overview of and topical guide to the history of Western civilization: . History of Western civilization – record of the development of human civilization beginning in Ancient Greece and Ancient Rome, and generally spreading westwards.