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The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day ...
Psychology. In psychology, the term early childhood is usually defined as the time period from birth until the age of five or six years, [1] therefore covering infancy, Pre-K, kindergarten and first grade. There are three simultaneous development stages: [2] It is distinct from early childhood education, and does not necessarily refer to the ...
539 Ma – present. The Phanerozoic Eon (Greek: period of well-displayed life) marks the appearance in the fossil record of abundant, shell-forming and/or trace-making organisms. It is subdivided into three eras, the Paleozoic, Mesozoic and Cenozoic, with major mass extinctions at division points.
Early childhood development. Early childhood development is the period of rapid physical, psychological and social growth and change that begins before birth and extends into early childhood. [1] While early childhood is not well defined, one source asserts that the early years begin in utero and last until 3 years of age. [1]
Zygote, at the start of an organism's life; Embryo, early in an organism's life; Foetus, early in an animal's life, occurring before birth; Larva, an early stage in many animal life forms before maturity; Child, early human 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.
Zendaya Maree Stoermer Coleman ( / zənˈdeɪ.ə / ⓘ zən-DAY-ə; [2] born September 1, 1996) [3] [4] is an American actress and singer. Her accolades include two Primetime Emmy Awards and a Golden Globe Award. Time named her one of the 100 most influential people in the world in 2022. Born and raised in Oakland, California, Zendaya began her ...
Earliest known life forms. Evidence of possibly the oldest forms of life on Earth has been found in hydrothermal vent precipitates. [1] The earliest known life forms on Earth may be as old as 4.1 billion years old (or Ga) according to biologically fractionated graphite inside a single zircon grain in the Jack Hills range of Australia. [2] The ...