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Scientific Perspectives

Science is based on observation. Things that cannot be observed cannot be supported by scientific evidence.

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A Scientific View of the World

License: CC BY-NC 3.0

What would be a scientific view of the world?

It could be said that the scientific view of the world is based on proven answers to specific questions. For example, "How old are recently identified fossils? What are the consequences of mutations in a certain gene? How does the endocrine system help maintain homeostasis?". These questions have definite answers which can help expand the scientific view of the world. Questions that cannot be answered with definitive answers, questions that cannot be proved with evidence, are not based on science. The scientific view of the world would not include answers to such questions.

A Scientific View of the World

Science is based on the analysis of observations made either through our senses or by using special equipment. Science therefore cannot explain anything about the natural world that is beyond what is observable. The term supernatural refers to entities, events, or powers regarded as being beyond nature, in that such things cannot be explained by scientific means. They are not measurable or observable in the same way the natural world is, and are therefore considered to be outside the realm of scientific examination.

When a natural occurrence which was previously considered supernatural is understood in the terms of natural causes and consequences, it has a scientific explanation. For example, the flickering lights sometimes seen hovering over damp ground on still evenings or nights are commonly called Will-o'-the-wisp. This phenomena looks like a lamp or flame, and is sometimes said to move away if approached. A great deal of folklore surrounds the legend, such as the belief that the lights are lost souls or fairies attempting to lead travelers astray. However, science has offered several potential explanations for Will-o'-the-wisp-- from burning marsh gases to glowing fungi, to animals that glow in a similar way to lightning bugs.

There is no single path that leads to scientific knowledge, and scientists do not follow a fixed set of steps when attempting to discover the answer to scientific questions. There are, however, certain specific features of scientific investigation. You do not have to be a professional scientist to think like a scientist. Everyone, including you, can use certain features of scientific thinking to analyze issues and situations in everyday life.

In science, it is assumed that the universe is a vast single system governed by basic rules and thus, things that are learned from studying one part of the universe can be applied to other parts of the universe. For example, the same principles of motion and gravitation that explain the motion of falling objects on Earth also explain the orbit of the planets around the sun, and galaxies, as shown in the Figure below. Thus nature, and what happens in nature, can be understood. However, as discussed below, as more and more information and knowledge is collected and understood, scientific ideas can change. Even though scientific knowledge usually stands the test of time, it cannot answer all questions.

Credit: Solar system: Courtesy of Harman Smith and Laura Generosa (nee Berwin), NASA; Ferris wheel: Flickr: mjtmail (tiggy)
Source: Solar system: http://commons.wikimedia.org/wiki/File:Solar_sys.jpg; Ferris wheel: http://www.flickr.com/photos/mjtmail/2589115469/
License: CC BY-NC 3.0

With some changes over the years, similar principles of motion have applied to different situations. The same scientific principles that help explain planetary orbits can be applied to the movement of a Ferris wheel.[Figure2]

Nature Can Be Understood

In science, it is presumed that events in the universe happen in patterns that can be understood by careful study. Scientists believe that with the help of instruments that extend the human senses and our own careful observation and analysis, people can discover patterns in all of nature that can help us understand all facets of life, the world, and the universe.

Scientists think of nature as a single system controlled by natural laws. Scientists strive to increase their understanding of the natural world by discovering natural laws. Laws of nature are expressed as scientific laws. A scientific law is a statement that describes what always happens under certain conditions in nature.

An example of a scientific law is the law of gravity, which was discovered by Sir Isaac Newton (see Figure below). The law of gravity states that objects always fall towards Earth because of the pull of gravity. Based on this law, Newton could explain many natural events. He could explain not only why objects such as apples always fall to the ground, but he could also explain why the moon orbits Earth. In addition to the laws of gravity, Newton also discovered laws of motion. His laws of motion allowed him to explain why objects move as they do.

Credit: Image copyright Dennis Cox, 2014
Source: http://www.shutterstock.com
License: CC BY-NC 3.0

Did Newton discover the law of gravity when an apple fell from a tree and hit him on the head? Probably not, but observations of nature are often the starting points for new ideas about the natural world.[Figure3]

Scientific Ideas Can Change

Science is a process for developing knowledge. Change in knowledge about the natural world is expected because there is often room for new observations which may challenge current views. No matter how well one theory explains a set of observations, it is possible that a different theory may explain them just as well or better, or may also encompass a wider range of observations. Scientists are always testing and attempting to improve theories. Scientists know that even if there is no way to gain complete knowledge about something, an increasingly accurate understanding of nature will develop over time.

The ability of scientists to make progressively more accurate predictions about the natural world, from determining how the smallest living organisms develop antibiotic resistance, to how "non-living" viruses continue to evolve, from how a cancerous tumor develops its own blood supply, to how mutations lead to cancer and other diseases, from trying to predict earthquakes, to calculating the orbit of an asteroid, provides evidence that scientists are gaining an understanding of how the world works.

Scientific Knowledge Can Stand the Test of Time

Continuity and stability are as much characteristics of science as change is. Although scientists accept some uncertainty as part of nature, most scientific knowledge stands the test of time. A changing of ideas, rather than a complete rejection of the ideas, is the usual practice in science. Powerful ideas about nature tend to survive, grow more accurate and become more widely accepted.

For example, in developing the theory of relativity, Albert Einstein did not throw out Issac Newton’s laws of motion but rather, he showed them to be only a small part of the bigger, cosmic picture. That is, the Newtonian laws of motion have limited use within our more general concept of the universe. For example, the National Aeronautics and Space Administration (NASA) uses the Newtonian laws of motion to calculate the flight paths of satellites and space vehicles.

The theory of evolution by natural selection is a classic example of a biological theory that has withstood the test of time. Developed over 150 years ago, a myriad of data has been collected to support Charles Darwin's theory. So far, no scientific information has been uncovered to contradict or counteract this scientific theory.

Science Cannot Offer Answers to All Questions

There are many things that cannot be examined in a scientific way. There are, for instance, beliefs that cannot be proved or disproved, such as the existence of supernatural powers, supernatural beings, or the meaning of life. In other cases, a scientific approach to a question and a scientific answer may be rejected by people who hold to certain beliefs.

Scientists do not have the means to settle moral questions surrounding good and evil, or love and hate, but they can sometimes contribute to the discussion of such issues by identifying the likely reasons for certain actions by humans and the possible consequences of these actions.


  • Science is based on the analysis of things that humans can observe either by themselves through their senses, or by using special equipment. Science therefore cannot explain anything about the natural world that is beyond what is observable by current means. Supernatural things cannot be explained by scientific means.


  1. What makes someone a "scientist?"
  2. Describe a scientific law.
  3. What is meant by nature can be understood?
  4. Discuss why science cannot answer all questions.

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Use this resource to answer the question that follows.

  1. Summarize the principles of biologist's E.O. Wilson's presentation.

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Image Attributions

  1. [1]^ License: CC BY-NC 3.0
  2. [2]^ Credit: Solar system: Courtesy of Harman Smith and Laura Generosa (nee Berwin), NASA; Ferris wheel: Flickr: mjtmail (tiggy); Source: Solar system: http://commons.wikimedia.org/wiki/File:Solar_sys.jpg; Ferris wheel: http://www.flickr.com/photos/mjtmail/2589115469/; License: CC BY-NC 3.0
  3. [3]^ Credit: Image copyright Dennis Cox, 2014; Source: http://www.shutterstock.com; License: CC BY-NC 3.0

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