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Explore the various answers and approaches to the question of what is the meaning of life, from different cultural and ideological backgrounds. Learn about the origin of the expression, the scientific inquiry and insights, the psychological significance and value, and the ethical implications of life.
Life is a quality that distinguishes matter that has biological processes from matter that does not. Learn about the scientific and philosophical definitions of life, the characteristics of living things, and the origin and evolution of life on Earth.
Many modern theories of the origin of life still take Oparin's ideas as a starting point. About this time, Haldane suggested that the Earth's prebiotic oceans (quite different from their modern counterparts) would have formed a "hot dilute soup" in which organic compounds could have formed.
Learn about different theories and definitions of living systems, such as Miller's open systems, Lovelock's Gaia hypothesis, Rosen's complex systems biology, and more. Explore how living systems interact with their environment, self-organize, and evolve.
Learn how life evolved from the earliest microorganisms to the diverse and complex forms of today, with evidence from fossils, biomarkers and molecular clocks. Explore the major events, processes and outcomes of life's history, from the Great Oxygenation Event to the Cambrian explosion, from mass extinctions to sexual reproduction.
The Great Silence theory is one of the possible explanations for the Fermi paradox, which asks why there is no evidence of extraterrestrial life in the universe. It suggests that intelligent civilizations are rare, short-lived, or isolated, and that humans are alone in the galaxy.
Abiogenesis is the natural process by which life arises from non-living matter, such as simple organic compounds. The article covers the stages, hypotheses, evidence, and challenges of abiogenesis, as well as its relation to astrobiology and the last universal common ancestor.
Existentialism is a family of views and forms of philosophical inquiry that explores the issue of human existence. It involves concepts such as existence precedes essence, authenticity, freedom, and anxiety in the face of an absurd world.