42,772 articles
Morrison Formation
The Morrison Formation is a Late Jurassic rock unit across the western United States, deposited about 157 to 150 million years ago and famous for dinosaur fossils.
Morse homology
Morse homology is a homology theory for a smooth manifold built from a Morse function's critical points and gradient flow lines between them, canonically isomorphic to singular homology.
Morse potential
The Morse potential, or Morse curve, is an empirical interatomic potential introduced by Philip M. Morse in 1929 to model the vibration of diatomic molecules.
Morse theory
Morse theory is a mathematical method that recovers the topology of a smooth manifold from the critical points of a smooth real-valued function on it.
Morse–Kelley set theory
Morse–Kelley set theory (MK), also called Kelley–Morse set theory, is an axiomatic set theory with sets and classes whose class comprehension allows quantification over proper classes.
Mortality rate
A mortality rate measures how often death occurs in a population, calculated as deaths divided by population size over a set period, expressed per 1,000 or 100,000.
Morton B. Panish
Morton B. Panish, born 1929 in New York, is an American physical chemist who co-demonstrated the first room-temperature continuous-wave semiconductor laser at Bell Labs in 1970.
Morton Brown
Morton Brown (1931–2024) was an American topologist at the University of Michigan best known for his 1960 proof of the generalized Schoenflies theorem, which won him the 1966 Veblen Prize.
Morton E. Gurtin
Morton E. Gurtin (1934–2022) was an American mathematician and mechanician at Carnegie Mellon University, known for his 1975 continuum theory of elastic material surfaces and for configurational forces.
Morton Kramer
Morton Kramer (1914–1998) was an American biostatistician called the father of mental health statistics; at NIMH he created the 1952 Model Reporting Area, a national mental health reporting system used for decades.
Morton L. Curtis
Morton L. Curtis (1921–1989) was an American mathematician and W. L. Moody Professor at Rice University, known for the Andrews–Curtis conjecture, the Curtis–Hedlund–Lyndon theorem, and work on finite H-spaces.
Morton S. Roberts
Morton S. Roberts (Morton Spitz Roberts, 1926–2024) was an American radio astronomer at the National Radio Astronomy Observatory whose galaxy rotation measurements gave early evidence for dark matter.
Morwen Thistlethwaite
Morwen Thistlethwaite is a mathematician and professor at the University of Tennessee known for computer tabulation of knots, work on the Jones polynomial, and the Tait conjectures.
MoS2 basal-plane activation by vacancies and strain
MoS2 basal-plane activation by vacancies and strain turns the normally inert basal plane of molybdenum disulfide into active hydrogen evolution sites using sulfur vacancies and lattice strain.
MOSAiC expedition
MOSAiC was an international Arctic expedition in which the German icebreaker Polarstern drifted frozen in sea ice from 2019 to 2020, studying the Arctic climate.
Moscovium
Moscovium (Mc), formerly ununpentium, is a synthetic superheavy chemical element with atomic number 115, first made in 2003 at Dubna, Russia, and named by IUPAC in 2016.
Moser spindle
The Moser spindle, or Moser graph, is a 7-vertex, 11-edge unit-distance graph requiring four colors, introduced by Leo and William Moser in 1961 as the first 4-chromatic unit-distance graph.
Moses Gomberg
Moses Gomberg (1866–1947) was an American organic chemist at the University of Michigan who in 1900 discovered the triphenylmethyl radical, the first persistent organic free radical, founding radical chemistry.
Moses H. W. Chan
Moses H. W. Chan, also published as M. H. W. Chan, is an American condensed matter physicist at Penn State known for 2004 supersolidity experiments in helium-4 that he later disproved.
Moses Kunitz
Moses Kunitz (1887–1978) was a Russian-American biochemist and enzymologist at the Rockefeller Institute who crystallized trypsin, chymotrypsin, and ribonuclease, helping establish that enzymes are proteins.
Moses Schönfinkel
Moses Schönfinkel (1888–1942) was a Russian logician and mathematician who invented combinatory logic, introduced the combinators S and K in his 1924 paper, and anticipated currying.
Moshe Zakai
Moshe Zakai (1926–2015) was an Israeli electrical engineer and applied probabilist at the Technion in Haifa, known for the Zakai equation and for work in information theory.
MoSi2N4
MoSi2N4 is a two-dimensional layered semiconductor first synthesized in 2020 via silicon passivation during CVD growth, launching the MA2Z4 family of over a hundred predicted materials.
Moskstraumen
Moskstraumen, also called Moskenesstraumen, is a strong tidal current and maelstrom in the Lofoten archipelago of Nordland, Norway, running between Lofotodden and the island Mosken; it inspired Poe's "A Descent into the Maelström".
Mosquito Fire
The Mosquito Fire was a 2022 wildfire in Placer and El Dorado counties, California, that burned 76,788 acres and became the state's largest wildfire of 2022.
Moss Sweedler
Moss Sweedler, also known as Moss Eisenberg Sweedler, is an American mathematician, Professor Emeritus at Cornell University, who established Hopf algebra theory and created the Sweedler notation.
Mössbauer spectroscopy
Mössbauer spectroscopy is a nuclear technique using recoil-free gamma-ray absorption, mainly of iron-57, to probe the local electronic and magnetic environment of atoms in solids.
Most significant change
Most significant change (MSC) is a participatory monitoring and evaluation technique developed by Rick Davies in Bangladesh in the 1990s, in which panels of stakeholders select the most significant stories of change.
Mostafa A. El‐Sayed
Mostafa A. El-Sayed, also known as M. A. El-Sayed, is a physical chemist at Georgia Tech known for the El-Sayed rules and gold nanorod cancer therapy.
Mothball
A mothball, also known as a moth crystal, is a small pesticide ball, usually naphthalene or paradichlorobenzene, that slowly vaporizes to kill or repel clothes moths in stored clothing.