Popular Science Education
Mars captured by the Insight mission
Krasnoyarsk meteorite
The Krasnojarsk meteorite is a famous type of stony iron meteorite, belonging to the Pallasite category. It was discovered in the Krasnoyarsk Krai of Russia in 1749. In 1749, local blacksmith Yakov Medvedev and mining foreman Yi Kai Metich discovered this meteorite about 145 miles south of Krasnoyarsk. In 1772, this meteorite was presented to scholar P.S. Pallas and was named after it.
Stein meteorite
The Stein meteorite fell on May 22, 1808, in the Moravian village of Stonarov (known as Stein in German) in today's Czech Republic. This type of meteorite is classified as part of the HED meteorite family, possibly from asteroid 4 Vesta, and belongs to the gabbro achondrite subgroup.
Syenite in alkaline rock masses
It is a type of magmatic rock that belongs to neutral deep-seated intrusive rocks. Light gray, with equigranular and spotted structures. Its silica content (about 60%) is comparable to diorite, but its alkaline content (sodium oxide, potassium oxide) is slightly higher than diorite. It is mainly composed of feldspar, amphibole, and biotite, with little or no quartz. Alkaline feldspar (usually orthoclase, plagioclase, and plagioclase) accounts for over 70% of feldspar. Often appearing as small rock masses, it forms a complex with basic and alkaline rocks.
Sphalerite
There are various colors of sphalerite, including white, gray, yellow (yellow patterned stone), blue, green, pink, and brown, while the stripes are white. The zinc in the composition is sometimes replaced by iron or manganese, and occasionally by small amounts of magnesium, calcium, cadmium, copper, cobalt, or lead. Similar to most carbonate minerals, it dissolves in hydrochloric acid and produces bubbles. In the calcite group, sphalerite belongs to a type with high hardness and specific gravity. In nature, zinc containing minerals are mostly sphalerite, and the production of sphalerite is relatively much lower. In addition to extracting zinc, it can also be used as semi transparent green or green blue gemstone jewelry.
Calculation formula for the volume of a cylinder (3D schematic diagram of the calculation formula)
Uranium bearing igneous rock
Spiral fracture (medical pathology 3D model)
Layered cubic structure diagram of squamous tissue on the skin
Neutrophils (Microscopic 3D Schematic)
Blue crystal mineral under ultraviolet irradiation
Kyanite crystals on matrix are a common mineral combination commonly found in metamorphic rocks. Blue sapphire is an aluminosilicate mineral with unique blue or blue-green crystals, commonly used in gemstones and industrial applications. The chemical formula of kyanite is Al ₂ SiO ₅, with a color range from light blue to dark blue, sometimes appearing green or gray. The crystal is usually in the shape of long columns or blades, with obvious cleavage planes. Blue spar is usually formed in high-pressure and low-temperature metamorphic environments, commonly found in gneiss and schist.
Silicified coral
Human tracheal structure (3D medical model with annotations)
Blue crystal
Kyanite crystals on matrix are a common mineral combination commonly found in metamorphic rocks. Blue sapphire is an aluminosilicate mineral with unique blue or blue-green crystals, commonly used in gemstones and industrial applications. The chemical formula of kyanite is Al ₂ SiO ₅, with a color range from light blue to dark blue, sometimes appearing green or gray. The crystal is usually in the shape of long columns or blades, with obvious cleavage planes. Blue spar is usually formed in high-pressure and low-temperature metamorphic environments, commonly found in gneiss and schist.
Celestite containing shiny pyrite
Lapis Lazuli with sparkling pyrite is a beautiful mineral combination mainly composed of lapis lazuli and pyrite. The chemical formula of lapis lazuli is (Na, Ca) ₈ (AlSiO ₄) ₆ (S, SO ₄, Cl) ₂, usually appearing dark blue, while pyrite is distributed in lapis lazuli with its golden yellow spots. lapis lazuli belongs to the equiaxed crystal system and usually exists in block form.
Techereu Jade
Jasper from Techereu is a mineral discovered in the Bal ș a area of Hunedoara County, Romania. Jade is an opaque rock that can appear in almost any color, depending on the mineral composition of the original sediment or volcanic ash. In the Techereu region, jadeite mainly exists in the conglomerates of the Cretaceous period, forming multicolored jadeite.
Cerussite
The composition of white lead ore is lead carbonate, which is sometimes partially replaced by silver or chromium. It belongs to the carbonate, aragonite group, and orthorhombic crystal system, and reacts with dilute acid to produce carbon dioxide bubbles, containing 77.6% Pb. The crystal is in the form of a plate-like or pseudo hexagonal bipyramidal shape, and it is common to run through twin crystals. Generally, it is a dense block like aggregate, bell like emulsion, or soil like structure. White or light yellow, brown, and other colors. Diamond luster. Hardness of 3-3.5, density of 6.4-6.6. Bubbling when encountering hydrochloric acid. It is a secondary mineral of galena that has been oxidized on the surface. Usually used together with galena to extract lead or prepare various lead compounds
The volcanic bomb on Tenerife Island
The volcanic bomb from Tenerife is a type of igneous rock formed during volcanic eruptions. These volcanic bombs are formed by the cooling and solidification of molten magma in the air, usually with unique shapes and textures. During a volcanic eruption, molten magma ejected from the volcano is formed by flying and cooling in the air. These rock blocks undergo rapid cooling and solidification in the air before finally falling to the ground. Volcanic bombs come in various shapes and sizes, usually presenting streamlined, spindle shaped, or irregular shapes.
Pathological types of fractures
International Space Station Serenity Node Three
Node 3 Tranquility is a module of the International Space Station (ISS). It was launched by the Space Shuttle Endeavour on February 8, 2010 and docked with the International Space Station on February 12, 2010.
C ă limani sulfur
The large chunks of sulfur from the C ă limani open-pit mine in Romania are a mineral found in the C ă limani volcanic mountain range. This open-pit mine is located in Suceava County, Romania. It was once a large sulfur mine that began in 1969 and was closed from 1992 to 1995. The chemical formula of sulfur is S, and pure sulfur appears bright yellow. Pure sulfur is usually bright yellow, but its color may change due to impurities such as clay and selenium impurities, which can cause it to appear red, green, brown, or gray. The C ă limani open-pit mine is a volcanic sulfur deposit.
Lymph node anatomical tissue (3D sectional structure diagram)
Roman currency Antoninian
Antoninianus is a silver coin from the Roman Empire period, introduced by Emperor Caracalla in 215 AD. Although its face value is two Denarius, its weight is much lower than that of two Denarius. Antoninian initially contained about 49.5% silver, but over time its silver content continued to decrease, reaching only 2.5% silver by 274 AD.
Transverse section of human kidney
Stella manatee skeleton
The Steller manatee, also known as the giant dugong, is an extinct species of manatee, first described by German naturalist Georg Wilhelm Steller in 1741. This giant marine mammal once lived near the Command Islands in the Bering Sea, mainly distributed in the waters between Alaska and Russia. Due to its slow movement and fearlessness of humans, the Stella manatee was overhunted within 27 years of its discovery and eventually became extinct in 1768.
Migvie Kirk Monument in Aberdeenshire
Migvie Kirk is located on a small road northwest of Tarland in Aberdeenshire. This irregularly shaped stone is made of gneiss and is 2.1 meters high. The front of the stone faces east, away from the gate you just walked through. The front is mostly occupied by carved crosses and decorative patterns. The outline of the cross is unusual, with four arms intersecting at the center. The upper corner is carved into the shape of a metal ring, as if this cross is a pendant depiction. Appropriate lighting and a little imagination are needed to see clearly, but there are other carvings on the area left by the angle of the cross.
Halley's Comet
Halley's Comet (catalog number 1P/Halley) is a periodic comet that orbits the Sun once every 76.1 years and is visible to the naked eye. Named after British physicist Edmund Halley (1656-1742) who first measured its orbital data and successfully predicted its return time. The orbital period of Halley's Comet is 76-79 years, and its next perihelion will be on July 28, 2061. Halley's Comet is the first recorded periodic comet in human history, dating back to at least 240 BC or 466 BC. There are clear records of this comet appearing in China, ancient Babylon, and medieval Europe.
Chloroplasts (microscopic 3D structural diagram)
Smoking and non-smoking lungs (3D model of medical pathology comparison)
A moving solar system model (3D demonstration animation)
The Monument of Intef
The Intef Stele is a stone tablet from the Middle Kingdom period of ancient Egypt, dating back to around 2000-1988 BC. It records the life and achievements of Intef. The top of the stone tablet bears the name of Nebhepetre Mentuhotep II, the founder of the Middle Kingdom. Intef claimed to be his servant and served as the fortress supervisor.
Archimedes' Law - True and False Golden Crowns (3D Demo Animation)
According to legend, King Hera II of Syria suspected that the gold crown he ordered might have been mixed with other cheap metals, so he asked Archimedes to verify its composition without damaging the crown. Archimedes determined the density of the golden crown by measuring its mass in air and water, using the principle of buoyancy, and found that it was not pure gold.
Small intestine wall cross-section (microscopic 3D structural diagram)
The small intestine wall is divided from the inside out into mucosal layer, submucosal layer, muscular layer, and serosal layer. The small intestine, as an important organ in the human digestive system, has functions such as digestion, absorption, motility, and immunity.
Water Clock Physics Experiment (3D Experimental Animation)
Wolverine specimen
The thylacine, also known as the Tasmanian wolf, is an extinct carnivorous marsupial. They once lived on the Australian mainland, Tasmania, and New Guinea. Due to being considered a threat to farm livestock, the wombat was heavily hunted and killed in the late 19th and early 20th centuries. The last known wolverine passed away in Hobart Zoo, Tasmania in 1936.
Random Model
Shanjiao
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Roman style greenhouse
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Borneo River herring specimen
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jumping spider
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Japanese Scallop Sashimi
105 View
Military projectile flash bomb
488 View
