The Scientific Method

Watch

• The Forgotten Origin of the Scientific Method ↗Be Smart
• The scientific method ↗Khan Academy
• The Scientific Methods: Crash Course History of Science #14 ↗CrashCourse
• Feynman on Scientific Method. ↗seabala
• The Scientific Method: Steps, Examples, Tips, and Exercise ↗Sprouts
• The Scientific Method ↗MooMooMath and Science

Read

• The Demon-Haunted World: Science as a Candle in the Dark ↗A compelling defence of scientific thinking against pseudoscience, offering a lucid guide to critical inquiry for the layperson.Carl Sagan
• The Logic of Scientific Discovery ↗This seminal work posits falsifiability, rather than verifiability, as the demarcation criterion for science, fundamentally reshaping our understanding of scientific progress.Karl Popper
• The Structure of Scientific Revolutions ↗A groundbreaking historical analysis revealing how science advances not merely by accumulation but through revolutionary paradigm shifts, challenging linear notions of progress.Thomas S. Kuhn
• Cargo Cult Science ↗A trenchant warning against self-deception and pseudo-science, urging rigorous honesty and the pursuit of evidence in all scientific endeavour.Richard P. Feynman
• Advice to a Young Scientist ↗A Nobel laureate's elegant and practical counsel on the intellectual and ethical demands of a scientific career, offering insights into the daily practice of inquiry.Peter Medawar

Voices to follow

• Steven Pinker ↗His rigorous defence of reason and empirical inquiry showcases the scientific method's enduring capacity to illuminate human nature and societal progress.Johnstone Family Professor of Psychology, Harvard University; Bestselling Author
• Carlo Rovelli ↗He elegantly distills complex scientific concepts, offering profound reflections on the experimental and theoretical frontiers that define modern physics.Theoretical Physicist; Popular Science Author
• Sabine Hossenfelder ↗Her incisive critiques of contemporary physics research and its methodologies provide a vital, often provocative, examination of the scientific process itself.Research Fellow, Frankfurt Institute for Advanced Studies; Science Communicator
• Sean Carroll ↗He adeptly navigates the intersection of physics and philosophy, demonstrating how the scientific method rigorously addresses humanity's most profound questions.Professor of Natural Philosophy, Johns Hopkins University; Science Communicator

Glossary

• ConclusionThe final statement that summarizes what you learned from your experiment and whether your data supported or rejected your original hypothesis. It answers your initial question. For example, after studying daily and seeing your grades improve, your conclusion might be: "My experiment showed that studying daily did lead to higher test scores, supporting my hypothesis."
• Control GroupA group in an experiment that does not receive the special treatment or change you are testing. It's used for comparison to make sure your results are actually due to what you changed. For example, if you're testing a new fertilizer on plants, the control group would be a set of plants that get no fertilizer, so you can compare their growth to the plants that did get fertilizer.
• DataThe facts, figures, and other information you collect during an experiment or observation. It can be numbers, descriptions, or measurements. For example, if you're testing if studying daily improves grades, your data would include your daily study times and your test scores.
• Dependent VariableThe thing you measure or observe in an experiment to see if it changes because of the independent variable. It's the outcome you are interested in. For example, in an experiment to see if studying daily improves grades, the "test scores" or "grades" would be your dependent variable, as they might depend on how much you studied.
• ExperimentA planned procedure carried out to test a hypothesis and see if your prediction is correct. It involves carefully changing one thing to see what effect it has. For example, to test if studying daily improves grades, you might decide to study for one hour every day for a month and then compare your grades to when you didn't study as much.
• HypothesisAn educated guess or a testable explanation for an observation or question. It's a statement you can try to prove or disprove through an experiment. For example, if you ask "Does studying every day lead to better grades?", your hypothesis might be: "Students who study daily will achieve higher test scores."
• Independent VariableThe one thing you purposefully change or control in an experiment to see if it causes a difference. It's what you are testing. For example, in an experiment to see if studying daily improves grades, the "amount of time spent studying daily" would be your independent variable.
• ObservationThe act of noticing something using your senses (sight, sound, smell, touch, taste) or tools like microscopes. It's how you gather information about the world around you. For example, you might observe that your friend who studies every day gets good grades.
• PredictionA statement about what you expect to happen if your hypothesis is true. It's the specific outcome you anticipate from an experiment. For example, if your hypothesis is that studying daily improves grades, your prediction might be: "If I study for an hour every day, then my next math test score will be higher than my last one."
• QuestionA specific inquiry that arises from an observation and can be answered through investigation or experimentation. It's what you want to find out. For example, after observing your friend's grades, you might ask, "Does studying every day lead to better grades?"
• Scientific MethodA step-by-step way that scientists use to explore, understand, and explain how the world works. It helps them answer questions in a structured and reliable way. For example, if you want to find out why your plant isn't growing well, you'd use the scientific method to figure out the problem and test solutions.
• Scientific TheoryA well-explained idea or set of ideas that is supported by a lot of evidence from many different experiments and observations. It's not just a guess, but a widely accepted explanation for how something works in nature. For example, the "Theory of Evolution" explains how life on Earth has changed over millions of years, backed by tons of fossil evidence and genetic studies.

Threads 9

Where this connects to other fields, and why it's worth knowing.

• Orthodoxy and Heresy Religion

  We imagine scientists cheerfully changing their minds when new evidence arrives. In reality the old guard often clings to their theory and treats challengers like a church treats heretics. Thinker Thomas Kuhn joked that science really advances one funeral at a time, as stubborn believers die off and fresh ones take over.

• Entrepreneurship and New Ventures Business

  A scientist has a hunch, builds a test, checks the result, and changes their mind if they're wrong. A startup does the identical thing: the rough first product is the experiment, the sales numbers are the test, and 'pivoting' just means the results proved the founder's guess wrong. Building a company is doing science on your own idea.

• Digital Health & Telemedicine Health

  Super-sensitive scans can spot tiny tumors so harmless you'd have died of old age never knowing they were there, yet once you know, you get surgery, worry, and side effects. So scanning everyone for everything can actually invent sick people and hurt them. Catching something 'early' isn't automatically better, sometimes the smartest move is not to look.

• Algorithms & Computation Mathematics

  Occam's razor says the simplest explanation is usually best. Computer science makes that exact: the best theory is the shortest computer program that can spit out your data. So understanding something is really just compressing it, and 'overfitting,' a theory bloated with extra bits, is the sign you memorized instead of truly explaining.

• News, Journalism & Verification Media

  Science journals love to publish surprising, exciting results and ignore the boring 'nothing happened' ones. So the official scientific record ends up stuffed with flukes that look more dramatic than reality. It's the same bias that makes the news misleading: if only the shocking stuff gets printed, your picture of the world gets warped, in the lab and on the front page alike.

• Procedure & Evidence Law

  Both scientists and courtrooms face the same problem: witnesses lie, data misleads, evidence is shaky. But they solve it in opposite ways. Science makes everyone slowly agree through repeated testing; law throws two sides into combat and lets a jury pick the winner. Weirdly, the courtroom now borrows science's rulebook to decide which expert testimony even counts.

• Religion and Science Religion

  The scientific method partly grew out of religion. Early scientists saw running experiments as 'reading God's second book' (nature), and believed the universe had lawful, discoverable order because a lawgiver made it. The hunt for the laws of physics was faith-driven before it was secular.

• Disinformation and Elections Political Science

  Casting doubt on election results and casting doubt on scientists use the exact same trick: flood people with fake uncertainty. And both fight back the same way, by having others check and repeat the work until the truth holds up.

• English as a Global Language Literature

  Almost all science is now published in English. So a brilliant discovery written in Spanish or Mandarin can go unread and unnoticed. The world's shared language quietly decides whose evidence counts, and stacks the deck against non-native speakers.