Erich Freytag
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May 29, 2024 · The phenomenon of life can be approached in several ways: life as it is known and studied on planet Earth; life imaginable in principle; and life, by hypothesis, that might exist elsewhere in the universe (see extraterrestrial life). As far as is known, life exists only on Earth.
5 days ago · Living things need food and water to survive. The Earth has just the right ingredients for life. Students in this grade band make observations to construct an evidence-based account of how an object made of a small set of pieces can be disassembled and made into a new object.
Sep 19, 2022 · Where did life on Earth begin? What are the ingredients of life on Earth? What are the major scientific theories for how life emerged? What is chirality and why is it biologically important? What research are UChicago scientists currently conducting on the origins of life? When did life on Earth begin? Earth is about 4.5 billion years old.
Some of the earliest theories of life were materialist, holding that all that exists is matter, and that life is merely a complex form or arrangement of matter. Empedocles (430 BC) argued that everything in the universe is made up of a combination of four eternal "elements" or "roots of all": earth, water, air, and fire.
May 29, 2024 · The origin of life is a result of a supernatural event—that is, one irretrievably beyond the descriptive powers of physics, chemistry, and other science. Life, particularly simple forms, spontaneously and readily arises from nonliving matter in short periods of time, today as in the past.
5 days ago · Meteorites of all shapes and sizes have impacted Earth. Investigations of the material in meteorites have shown that the chemical elements needed for life can be found inside of these space rocks. These elements are known as the CHNOPS elements (carbon, hydrogen, nitrogen, oxygen, phosphorous, and sulfur).
May 15, 2007 · According to this approach, inquiring into life’s meaning is nothing other than seeking out sense-making information, perhaps a narrative about life or an explanation of its source and destiny. This analysis has the advantage of promising to unify a wide array of uses of the term “meaning.”
