Life science is the science that systematically expounds on major issues related to the nature of life. The laws of physics and chemistry that govern the inanimate world also apply to the living world, without giving a mysterious vitality to living matter. The in-depth understanding of life sciences can undoubtedly promote the development of other fields of human knowledge, such as physics and chemistry. For example, the century-old puzzle in the life sciences is "Where does intelligence come from?" We know all about the activity of individual neurons, but we don't know anything about how tens of billions of neurons combine to form intelligence in the brain. Arguably the greatest challenge to human intelligence is how to explain intelligence itself. The gradual deepening of this problem will also change the structure of human knowledge.
Life science research relies not only on physical and chemical knowledge, but also on the instruments provided by the latter, such as optical and electron microscopes, protein electrophoresis instruments, ultracentrifuges, X-ray machines, nuclear magnetic resonance spectrometers, positron emission tomography scanners, and so on. Life scientists are also drawn from a variety of disciplines. The cross-penetration of disciplines has led to many promising growth points and emerging disciplines.