with increasing age
21Maternal age effect — The maternal age effect describes the exponentially increasing risks for numerical chromosomal abnormalities among a prospective mother s gametes as she ages. This increase reflects the overall increase in the rate of nondisjunction with maternal …
22Middle age — For other uses, see Middle Ages (disambiguation). Middle age is the period of age beyond young adulthood but before the onset of old age. Various attempts have been made to define this age, which is around the third quarter of the average life… …
23Stone Age — the period in the history of humankind, preceding the Bronze Age and the Iron Age, and marked by the use of stone implements and weapons: subdivided into the Paleolithic, Mesolithic, and Neolithic periods. [1860 65] * * * First known period of… …
24The Age — For other uses, see Age (disambiguation). The Age The front page of The Age on 6 June 2011 …
25old age — old age, adj. the last period of human life, now often considered to be the years after 65. [1300 50; ME] * * * Introduction also called senescence in human beings, the final stage of the normal life span. Definitions of old age are not… …
26Hellenistic Age — In the eastern Mediterranean and the Middle East, the period between the death of Alexander the Great (323 BC) and the conquest of Egypt by Rome (30 BC). Alexander and his successors established Greek monarchies that controlled the area from… …
27Middle Stone Age — This article is about the term as applied to African prehistory. See Mesolithic for the middle period of the Stone Age in general. See Middle Paleolithic for the middle part of the Old Stone Age . The Middle Stone Age (or MSA) was a period of… …
28Science in the Age of Enlightenment — The scientific history of the Age of Enlightenment traces developments in science and technology during the Age of Reason, when Enlightenment ideas and ideals were being disseminated across Europe and North America. Generally, the period spans… …
29Communication with extraterrestrial intelligence — (CETI) is a branch of the search for extraterrestrial intelligence that focuses on composing and deciphering messages that could theoretically be understood by another technological civilization. The best known CETI experiment was the 1974… …
30Naval tactics in the Age of Sail — A 17th century Spanish galleon Naval tactics in the Age of Sail were used from the early 17th century onward when sailing ships replaced oared galleys. These were used until the 1860s when steam powered ironclad warships rendered sailing line of… …
