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16 hours ago · Ctenophora (/ təˈnɒfərə / tə-NOF-ər-ə; sg.: ctenophore / ˈtɛnəfɔːr, ˈtiːnə -/ TEN-ə-for, TEE-nə-; from Ancient Greek κτείς (kteis) 'comb' and φέρω (pherō) 'to carry') [6] comprise a phylum of marine invertebrates, commonly known as comb jellies, that inhabit sea waters worldwide. They are notable for the groups of ...
16 hours ago · South Korea, [ c ] officially the Republic of Korea (ROK), [ d ] is a country in East Asia. It constitutes the southern part of the Korean Peninsula and borders North Korea along the Korean Demilitarized Zone; though it also claims the land border with China and Russia.
16 hours ago · The nature of both dark energy and dark matter is unknown. Dark matter, a mysterious form of matter that has not yet been identified, accounts for 26.8% of the cosmic contents. Dark energy, which is the energy of empty space and is causing the expansion of the universe to accelerate, accounts for the remaining 68.3% of the contents. [8] [98] [99]
16 hours ago · Birds are a group of warm-blooded vertebrates constituting the class Aves (/ ˈeɪviːz /), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
