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Chrysocolla has a cyan (blue-green) color and is a minor ore of copper, having a hardness of 2.5 to 7.0. It is of secondary origin and forms in the oxidation zones of copper ore bodies. Associated minerals are quartz , limonite , azurite , malachite , cuprite , and other secondary copper minerals.
As of December 2019, the International Union for Conservation of Nature (IUCN) has evaluated the conservation status of 280 fungus species. [1] Previously in the 2017-3 release, the IUCN evaluated the conservation status of 56 fungus species. [2] One subspecies, that of Pleurotus nebrodensis, also was evaluated but has since been removed. At ...
The World's 100 most threatened species [1] is a compilation of the most threatened animals, plants, and fungi in the world. It was the result of a collaboration between over 8,000 scientists from the International Union for Conservation of Nature Species Survival Commission (IUCN SSC), along with the Zoological Society of London . [ 2 ]
The team extracted DNA from water samples and tested it to reveal the presence of 161 species, including the dwarf loach (an endangered freshwater fish), the Asiatic softshell turtle and the Asian ...
They were once thought to be extinct but were rediscovered in 2001. ‘Tree lobsters’ — the rarest insects on Earth — are on exhibit at a US zoo. See them
Eight of the extinct bird species were found in Hawaii, including the Po`ouli, which was last seen in 2004. The Po`ouli is the most recently seen species of all 21 animals on the list.
This page features lists of species and organisms that have become extinct. The reasons for extinction range from natural occurrences, such as shifts in the Earth's ecosystem or natural disasters, to human influences on nature by the overuse of natural resources, hunting and destruction of natural habitats.
The Red List of 2012 was released 19 July 2012 at Rio+20 Earth Summit; [17] nearly 2,000 species were added, [18] with 4 species to the extinct list, 2 to the rediscovered list. [19] The IUCN assessed a total of 63,837 species which revealed 19,817 are threatened with extinction.