Life Science is about using scientific methods to study life on Earth in general to understand human life and how to make it better. It all started with Philosophy that tried to analyze why we exist, to rationalize our existence, and to quantify the purpose and meaning of our existence. After 2000 years, there is at least one field of Life Science whose name begins with a letter in the 26 alphabets, for example, Anatomy/Biology/Chemistry/…../Mathematics/neurology/ Ophthalmology /…/Zoology. Each field is specialized and dedicated to studying one aspect of life. As we learn more about life, we find it to be more complex and complicated. So, for the knowledge to be practical and applicable to our daily life, we need to break it down into smaller and smaller pieces to concentrate and narrow the scope for deeper study.
To understand how we think, why we do things the way we do, how we get sick, and how to get better, we need to understand how our body works. The results are that there is a specialized field of Life Science for every distinct part of the body both inside and out:
1) From the outside, there are eyes, nose, mouth, hairs, skin, and 4 limbs.
2) From the inside, there are the circulation system, the digestive system, the respiratory system, the immune system, the nervous system, the muscle, and skeletal structures.
Base on all this knowledge, we set up hospitals with doctors, surgeons, and medical equipment to treat our physical and mental problems. We learn the importance of a balanced diet, moderation in our indulgence, and regular exercises to build up our immunity, to strengthen our bodily functions, and to avoid unnecessary hospital visits.
To understand our role in Nature and why we are the most dominant species enjoying life, not at the mercy of Nature's furies, we need to understand how and why other living things live in the wild. The results are that there is a specialized field of Life Science for every living thing on Earth. They include:
1) Fish in the water,
2) Birds in the sir,
3) Plants that grow from the ground,
4) Animals that run on the ground, and
5) Insects that are seemingly everywhere.
Based on all this knowledge, we learn that the hundreds of millions of living things with unique shapes, sizes, and functions that we have identified so far are the results of millions of years of evolving and adapting to a well-regulated ecosystem. Every living thing in the ecosystem lives off one another, depends on one another, and is at the mercy of Nature’s grace and wrath. We are the product of such a process. The difference is that we are no longer living off and depending on the other living things for survival. Most importantly, we have developed our ecosystem to ensure our survival according to our leisure, pleasure, and adventure.
To understand why we can live, build, and manufacture only in certain ways, we have to understand the origin of the physical laws that permeate everywhere on Earth as well as to the Outerspace. To understand why life can arise from inanimate matters and what our destiny on Earth is, we need to understand the solar system, planets, stars, galaxies, and everything in the Universe. The results are that there is a specialized field of Life Science that enables us to study:
1) Objects billions of light-years away from Earth,
2) The formation/distribution of galaxies,
3) The death/birth of stars, and
4) The chance occurrence of the solar systems and their planets.
Based on all this knowledge, we learn that everything happens randomly but is guided by the physical laws and that the building materials of life on Earth exist everywhere in the Universe. Life can germinate only on a planet in the solar system and intelligent life can only flourish on a planet with a favorable set of environmental and cosmic conditions. Intelligent life like us is a rare occurrence but by no means unique and only event.
Life Science allows us to understand why there are such diversified/varied/multitude of living things that are beyond imagination/amazement/appreciation and how they can co-exist/compliment/challenge one another incessantly. We can see the same parallel in us, human beings:
1) There are people of all sizes and shapes with different mental and physical capabilities,
2) We know the importance of sharing our unique talents and resources to survive and prosper,
3) We constantly challenge and or fight with one another over ideological differences, territories, and natural resources.
However, with the help of Life Science, we are the only living thing who knows where all these activities lead to and the fate of life on Earth. Today, the knowledge base is so huge in breadth and depth that a person can immerse one's lifetime to study, understand, and advance the content of just one field of Life Science.
We have come a long way since the dawn of our civilization whence we lived day to day wondering where our next meal would come from, were in constant fear of the predators, and were at the mercy of the unpredictable weathers. Today, after 7000 years, we live day to day making sure that we do not overeat, are constantly worry about the HIGH blood pressure/cholesterol/blood sugar, and work in temperature-controlled dwellings attempting to put all the pieces together in the fragmented Life Science.