Science (from Latin scientia, meaning "knowledge") is an organized system of learning that builds and organizes knowledge in the form of confirmable explanations and predictions about the universe.

The scientific method seeks to explain the events of nature in areproducible way.  An explanatory thought experiment or hypothesis is put forward as explanation using principles such as parsimony (also known as "Occam's Razor") and are generally expected to fit well with other accepted facts related to the phenomena.

Contemporary science is typically subdivided into the natural sciences, which study the material universe; the social sciences, which study people and societies; and the formal sciences, which study logic and mathe-matics. In general usage, the term “Science” refers to the natural sciences.  Disciplines which use science, like engineering and medicine, may also be considered to be applied sciences.

It is that scientific knowledge enables us to do all kinds of things and to make all kinds of things. The comfort and advantages of modern life are due primarily to the application of science.

                       BUT . . . .

Science is and always will be imperfect. Scientists and physicians often stand by and follow theories that are later discarded for lack of evidence. Many ideas are called theories, when in actuality they are merely hypotheses. The difference being that a theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. 

A hypothesis, on the other hand, is merely an idea or supposition that has little or no evidence to support it. 

One such hypothesis was that of the Geocentric Universe, the idea that the Earth is the center of the Universe. It was an idea widely accepted by scientists until Nicholas Copernicus disproved the theory in 1543 through evidence obtained with the telescope.

To prop up the idea of the geocentric universe in the face of astronomical observations, scientists had to postulate the existence of “Crystal Spheres”.  These were thick spheres of some rarefied transparent matter nested one within the other, with the Earth at the core.  The stars were said to be on the surface of a single starry outermost sphere. Their revolutions satisfied scientists for a millennia. Over the centuries, additional astronomical observations required the crystal spheres to perform more and more complex movements. Finally the telescopic observations of Galileo in the 16th century forced scientists to abandon the concept.

Another deposed scientific idea is the Miasmatic theory of disease. During the Middle Ages, it was believed that diseases were caused by being exposed to miasma (or "bad air"). This theory was received until the 1800s, when germ theory began to take its place..

The very basis of science, mathematics, is only a theory that has some flaws. Clearly the theory of mathematics is a flawed. It is based on the idea that there are both negative things—things that are less than nothing. Mathematicians have had to create an “imaginary  number”- a number they know does not exist, in order to prop up this idea.

The creation of the square root of minus one ( i ) became necessary to resolve the conflict between two mathematical principles. 1) every number has a square root, and 2) two minus number can only be the product of a minus number and a positive number, making it impossible for a minus number to have a square root. The invention of the i made everything work.

Another recent  scientific invention, the quantum theory. is the result of confusing perception with reality. In attempting to explain explains the behavior of matter as it interacted with energy on the scale of atoms and subatomic particles, there were two opposing theories 1) it acted like a wave 2) it acted like a particle. Both ideas was supported by various experiments. Plank then suggested the quantum theory which essentially said that observation affects the outcome of an experiment.—that we cannot know what is going on until we see it.

Two other weaknesses of science is the failure to explain what space is and what consciousness is.

We should trust science, but we should also be aware that there is still much to be understood about reality.