pedernal

pedernal

A kind of hard, rock with a glassy opaque appearance. It was a favorite raw material for many prehistoric humans for the manufacture of tools such as knives and scraping implements.

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Industri / Domain: Antropologi
Kategori: Antropologi fisik
Company: Palomar College
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enfermedad endémica

Antropologi; Antropologi fisik

A disease that remains at a more or less constant frequency of affected individuals in a population all of the time. Examples: hypertension, tooth decay, and malaria.

polimorfismo

Antropologi; Antropologi fisik

A genetic trait controlled by more than one allele, each of which has a frequency of 1% or greater in the population gene pool. See balanced polymorphism.

termoluminiscencia (TL)

Antropologi; Antropologi fisik

A radiometric dating method based on the fact that trace amounts of radioactive atoms, such as uranium and thorium, in some kinds of rock, soil, and clay produce constant low ...

modelo de asimilación

Antropologi; Antropologi fisik

A hypothesis to explain the origin of modern Homo sapiens. It proposes that the first modern humans evolved in Africa, but when they migrated into other regions they did not ...

potasio-argón

Antropologi; Antropologi fisik

A radiometric dating method based on the fact that potassium-40 in volcanic rock decays into argon-40 and calcium-40 at a known rate. The half-life of potassium-40 is ...

trisomía 21

Antropologi; Antropologi fisik

A genetically inherited form of mental retardation usually resulting from the inheritance of an extra autosome 21. Down syndrome individuals also typically are short and stocky in ...

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Industri / Domain: Manufaktur Kategori: Kaca

Gorilla Glass 4

Corning Incorporated anunció su última innovación en el diseño de material de electrónica de consumo, el revolucionario Corning® Gorilla® Glass 4, que ...