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4 days ago · It is thought that the first true alphabetic writing was developed around 2000 BCE for Semitic-speaking workers in the Sinai Peninsula by giving Egyptian hieratic letters Semitic values. The Geʽez script of Ethiopia and Eritrea is an evolution of the Ancient South Arabian script , in which early Geʽez texts were originally written.
4 days ago · The earliest known alphabetic inscriptions, at Serabit el-Khadim ( c. 1500 BC), appear to record a Northwest Semitic language, though only one or two words have been deciphered. In the Early Iron Age, alphabetic writing spread across the Near East and southern Europe.
10 hours ago · Geophysical Research Letters is an AGU journal publishing high-impact, innovative articles on major advances spanning all of the major geoscience disciplines. Abstract Besides the cusp, polar cap, and auroral oval, the nightside subauroral zone has also recently been reported as a source region of the ionospheric oxygen outflows.
6 days ago · The rigid, outermost rocky shell of a terrestrial planet or natural satellite. The Earth's lithosphere is composed of the crust and the portion of the upper mantle that behaves elastically on time scales of up to thousands of years or more. lithotype Specific types of rock classified according to the standards of lithology. loess
5 days ago · Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. It is designated by the symbol ♁.
- Earth is the third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its near-surface environments ar...
- Earth is located in the Orion-Cygnus Arm, one of the four spiral arms of the Milky Way, which lies about two-thirds of the way from the centre of t...
- Earth’s name in English, the international language of astronomy, derives from Old English and Germanic words for ground and earth, and it is the o...
- Earth and the other planets in the solar system formed about 4.6 billion years ago. The early Earth had no ozone layer and no free oxygen, lacked o...
- Viewed from another planet, Earth would appear bright and bluish in colour. In latitudinal belts, swirling white cloud patterns of midlatitude and...
14 hours ago · Here are six major ways meteorites and comets have contributed to Earth’s history or our knowledge of it. 1. The age of our planet. About 4.5 billion years ago, a Mars-sized planet collided with ...
5 days ago · Millisecond pulsars are rotating neutron stars that emit regular electromagnetic signals, similar to lighthouses. The pulsar PSR J0437-4715 is the closest to Earth and thus the brightest. Researchers with the participation of TU Darmstadt have now gained new insights into the neutron star’s radius and its consequences for the equation of state of dense matter. The results are published in a ...
