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  2. Male expendability - Wikipedia

    en.wikipedia.org/wiki/Male_expendability

    This article needs attention from an expert in Anthropology.The specific problem is: It is not clear exactly how big of a deal this idea is in anthropology, whether it really is a counterpart to economy-of-effort theory and compatibility with childcare, and an expert would probably be able to identify some sources (or have an old undergraduate textbook on hand) to provide solid grounding.

  3. Questioning (sexuality and gender) - Wikipedia

    en.wikipedia.org/wiki/Questioning_(sexuality_and...

    The questioning of a young individual's sexuality or sexual orientation comes into play in a variety of situations; regardless of experience or lack thereof. For example, an individual who generally identifies themselves as homosexual may also have sexual interactions with the opposite sex, but do not necessarily feel that they are bisexual.

  4. Life - Wikipedia

    en.wikipedia.org/wiki/Life

    The definition of life has long been a challenge for scientists and philosophers. [ 2 ] [ 3 ] [ 4 ] This is partially because life is a process, not a substance. [ 5 ] [ 6 ] [ 7 ] This is complicated by a lack of knowledge of the characteristics of living entities, if any, that may have developed outside Earth.

  5. Meaning of life - Wikipedia

    en.wikipedia.org/wiki/Meaning_of_life

    The first English use of the expression "meaning of life" appears in Thomas Carlyle's Sartor Resartus (1833–1834), book II chapter IX, "The Everlasting Yea". [1]Our Life is compassed round with Necessity; yet is the meaning of Life itself no other than Freedom, than Voluntary Force: thus have we a warfare; in the beginning, especially, a hard-fought battle.

  6. Missing link (human evolution) - Wikipedia

    en.wikipedia.org/wiki/Missing_link_(human_evolution)

    Piltdown Man: A set of bones found in 1912 thought to be the "missing link" between ape and man. Eventually revealed to be a hoax. Nebraska Man: Originally described as an ape by Henry Fairfield Osborn in 1922, on the basis of a tooth found by rancher and geologist Harold Cook in Nebraska in 1917. Later, the original classification proved to be ...

  7. History of research into the origin of life - Wikipedia

    en.wikipedia.org/wiki/History_of_research_into...

    The basic idea was that life was continuously created as a result of chance events. [17] In the 17th century, people began to question spontaneous generation, in works like Thomas Browne's Pseudodoxia Epidemica. His contemporary, Alexander Ross, erroneously rebutted him. [18] [19] In 1665, Robert Hooke published the first drawings of a ...

  8. Tree of life (biology) - Wikipedia

    en.wikipedia.org/wiki/Tree_of_life_(biology)

    The tree of life or universal tree of life is a metaphor, conceptual model, and research tool used to explore the evolution of life and describe the relationships between organisms, both living and extinct, as described in a famous passage in Charles Darwin's On the Origin of Species (1859). [1]

  9. Living systems - Wikipedia

    en.wikipedia.org/wiki/Living_systems

    Some scientists have proposed in the last few decades that a general theory of living systems is required to explain the nature of life. [1] Such a general theory would arise out of the ecological and biological sciences and attempt to map general principles for how all living systems work. Instead of examining phenomena by attempting to break ...