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A snowflake is a single ice crystal that has achieved a sufficient size, and may have amalgamated with others, which falls through the Earth's atmosphere as snow. [1 ...
Snow can be compacted to form a snow road and be part of a winter road route for vehicles to access isolated communities or construction projects during the winter. [78] Snow can also be used to provide the supporting structure and surface for a runway, as with the Phoenix Airfield in Antarctica. The snow-compacted runway is designed to ...
The hexagonal snowflake, a crystalline formation of ice, has intrigued people throughout history.This is a chronology of interest and research into snowflakes. Artists, philosophers, and scientists have wondered at their shape, recorded them by hand or in photographs, and attempted to recreate hexagonal snowflakes.
The Caldecott Medal winner in 1999 for the best-illustrated children's book was Snowflake Bentley, which remembers Bentley's life. [ 11 ] At the Fairbanks Museum and Planetarium , a noted meteorological observation center in St. Johnsbury, Vermont , there is an exhibit about atmospheric ice crystal formation featuring several of Bentley’s ...
Nakaya Ukichoro Museum of Snow and Ice (the hexagonal building, echoing the six-sided nature of snowflakes), at Katayamazu hot springs, Kaga, Ishikawa, Japan. Nakaya was born near the Katayamazu hot springs in Kaga, Ishikawa Prefecture, near the area depicted in Hokuetsu Seppu, an encyclopedic work published in 1837 that contains 183 sketches of natural snowflake crystals – the subject that ...
Similarly, animals are often categorized in ways such as domestic, farm animals, wild animals, pests, etc. according to their relationship to human life. Animals as a category have several characteristics that generally set them apart from other living things.
The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day species indicate that they have diverged through the ...
Animals mainly have bilateral or mirror symmetry, as do the leaves of plants and some flowers such as orchids. [30] Plants often have radial or rotational symmetry, as do many flowers and some groups of animals such as sea anemones. Fivefold symmetry is found in the echinoderms, the group that includes starfish, sea urchins, and sea lilies. [31]