examination

Astrobiology

...finite evidence of extraterrestrial life. However examination of meteors from Antarctica which are presumed to have originated from the planet Mars have provided what some scientists believe to be microfossils of extraterrestrial life, although that interpretation of the evidence is still controversial. I...

Twin

... except that they are sometimes mirror images, but examination of details such as fingerprints can tell them apart. As they mature, identical twins often become less alike because of lifestyle choices or external influences such as scars. It is thought that identical twins do not run in families, but rather i...

Magnetic resonance imaging

...ear , and to prevent patients from associating the examination with radiation exposure. Scientists still use ... changes of multiple sclerosis . The typical MRI examination typically consists of 5-20 sequences, each of which are chosen to provide a particular type of infor...

Louis Pasteur

... composition was the same. Pasteur noticed, upon examination of the tiny crystals of tartaric acid, that the crystals came in two asymmetric forms that were mirror images of one another. Tediously sorting the crystals by hand gave two forms of tartaric acid: solutions of one form rotated polarised light cloc...

Immunology

... showTocToggle("show","hide") 1 Histological examination of the immune system 2 Classical immunology ... 7 See Also 8 References Histological examination of the immune system Before even the concept of immunity was developed numerous early physicians ...

Eugenics

...d Richard Herrnstein have argued, based on their examination of the records of the Congressional debates over immigration policy, that in fact Congress gave virtually no consideration to these factors. Rather, they maintain, the restrictions were motivated primarily by a desire to maintain the country's cult...

Cancer

...s the removal of cells and/or pieces of tissue for examination by a pathologist . The tissue diagnosis indicates...f finding a benign or malignant tumor, microscopic examination of a biopsy specimen will sometimes detect a condition called "hyperplasia". Hyperplasia refers to...