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20 hours ago · A paleontologist at work at John Day Fossil asses National Monument. Paleontology (/ ˌ p eɪ l i ɒ n ˈ t ɒ l ə dʒ i, ˌ p æ l i-,-ən-/ PAY-lee-on-TOL-ə-jee, PAL-ee-, -ən-), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present).
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20 hours ago · In biology, abiogenesis (from Ancient Greek ἀ- (a-) 'not', βῐ́ος (bíos) 'life', and γένεσις (génesis) 'origin'), or the origin of life, is the natural process by which life has arisen from non-living matter, such as simple organic compounds. The prevailing scientific hypothesis is that the transition from non-living to living ...
May 22, 2024 · A recent lab experiment showed the survival and metabolism of archaea with water supplied only by deliquescence (Maus et al. 2020). Even macroscopic forms of life, given sufficient time to emerge over the history of such an exoplanet, could still persist in sequestered environments like the lava caves known to be abundant on Mars (Irwin and ...
May 22, 2024 · The overflow-based experiment showed that the slope treated with biopolymer had a healthy turf grass growth due to its hydrophilic nature which added as a deterrent to soil loss. AA Dubey et al. ( 2021 ) used biopolymer, xanthan gum in bio-cemented soils to control river-bank erosion using a hydraulic flume erosion test.
20 hours ago · The properties of ice vary substantially with temperature, purity and other factors. Ice is water that is frozen into a solid state, typically forming at or below temperatures of 0 ° C, 32 ° F, or 273.15 K. As a naturally occurring crystalline inorganic solid with an ordered structure, ice is considered to be a mineral.
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- 3400 to 37,500 kg-force/cm³
- 5 to 18 kg-force/cm²
20 hours ago · Occurrence in humans and the biosphere Polonium-210 is widespread in the biosphere , including in human tissues, because of its position in the uranium-238 decay chain . Natural uranium-238 in the Earth's crust decays through a series of solid radioactive intermediates including radium-226 to the radioactive noble gas radon-222 , some of which ...
20 hours ago · Ethics, also referred to as moral philosophy, is the study of moral phenomena. It is one of the main branches of philosophy and investigates the nature of morality and the principles that govern the moral evaluation of conduct, character traits, and institutions. It examines what obligations people have, what behavior is right and wrong, and ...
