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Charles Darwin

(1809—1882) naturalist, geologist, and originator of the theory of natural selection

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Adam Sedgwick

Adam Sedgwick  

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Overview Page
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Philosophy
(1785–1873)Woodwardian Professor of Geology at Cambridge, where he modernized the teaching of geology. He is best known for unravelling the stratigraphy of North Wales (the Cambrian System) which ...
adaptive radiation

adaptive radiation  

The evolutionary process whereby species that are descended from a common ancestor diverge to exploit different ecological niches.
age of the earth

age of the earth  

The time since the earth emerged as a planet of the sun, estimated by dating techniques to be about 4.6 × 109 years. The oldest known rocks on earth are estimated by radioactive dating to be about ...
agnosticism

agnosticism  

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Overview Page
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Religion
The view that some proposition is not known, and perhaps cannot be known to be true or false. The term is particularly applied to theological doctrines.
Albert Einstein

Albert Einstein  

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(1879–1955)German-born physicist, a thinker of astounding insight, author of the special and general theories of relativity, and winner of the 1921 Nobel Prize for Physics for his work on the ...
Alexander Smith

Alexander Smith  

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Philosophy
(1796–1851)Alexander Smith was born in Banff on 12 June 1796, one of four children of a well-known family of architects and builders, and died there on 12 February 1851. ...
Alexander von Humboldt

Alexander von Humboldt  

(b. Berlin, 14 September 1769; d. Berlin, 6 May 1859)German naturalist and explorer who made major contributions to various sciences, including geology, geomagnetism, and meteorology. Together with ...
Alfred Russel Wallace

Alfred Russel Wallace  

(1823–1913)British naturalist, who in 1848 went on an expedition to the Amazon, and in 1854 travelled to the Malay Archipelago. There he noticed the differences between the animals of Asia and ...
Amotz Zahavi

Amotz Zahavi  

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Overview Page
Subject:
Linguistics
(b. 1928),Israeli biologist who has formulated a comprehensive theory of animal display and signaling. The theory asserts that the reliability, hence effectiveness, of signals depends on the cost, or ...
Antiquity of Humankind

Antiquity of Humankind  

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Overview Page
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Archaeology
OverviewAntiquity of Humankind In the Old WorldAntiquity of Humankind In the AmericasOverviewAntiquity of Humankind In the Old WorldAntiquity of Humankind In the AmericasPrior to the mid-nineteenth ...
Asa Gray

Asa Gray  

(1810–88)An American botanist and taxonomist who did much to popularize the study of botany and to expound, but also criticize, Darwin's evolutionary theory. In 1842, he was appointed Fisher ...
astrophysics

astrophysics  

The study of the physical and chemical processes involving astronomical phenomena. Astrophysics deals with stellar structure and evolution (including the generation and transport of energy within ...
atoll

atoll  

Ring-shaped organic reef that encloses or almost encloses a lagoon, and which is surrounded by the open sea. The reef may be built of coral and/or calcareous algae. An atoll is built on an existing ...
authors — doctors as

authors — doctors as  

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In 1936, Lord Moynihan of Leeds (1865–1936), a famous surgeon, gave a Linacre lecture, published the same year and republished in 1983. He called his lecture: Truants — the story ...
biogenetic law

biogenetic law  

The early stages of development in animal species resemble one another, the species diverging more and more as development proceeds. The law was formulated by the embryologist E. K. von Baer ...
biology

biology  

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The study of living organisms; or a generic term for the life sciences, including botany, zoology, anatomy, physiology, biochemistry, and related disciplines. [From Greek bios life + logos word, ...
blending inheritance

blending inheritance  

The early theory that assumed that hereditary substances from parents merge together in their offspring. Mendel showed that this does not occur (see Mendel's laws). In breeding experiments an ...
blushing

blushing  

Uncontrollable reddening of the cheeks, and sometimes the ears and neck, is associated with embarrassment and guilt. Charles Darwin made the most interesting suggestion: that blushing is a warning ...
breeding

breeding  

The process of sexual reproduction and bearing offspring. Selective breeding of both plants and animals is used in agriculture to produce offspring that possess the beneficial characters of both ...
Charles Bell

Charles Bell  

(1774–1842)Charles Bell was born in Edinburgh in November 1774 and died at Hallow Park, near Worcester on 28 April 1842. He received his early training in the ‘Arts of ...

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