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Sagan was an American astronomer and astrophysicist who was one of the most prolific science writers of the last 50 years. He is one of our knowledge heroes, appearing in the BQ lessons to help us to explore the importance of evidence when making claims.

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Popper, an Austro-British academic, wrote on just about every subject there is. He is one of our knowledge heroes, and appears in the BQ lessons to help us explore the way scientific knowledge has to be ‘falsifiable’, and how we are often misled by our own biases.

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Pasteur was a French biologist, microbiologist, and chemist. He made huge breakthroughs in vaccination, microbial fermentation, and pasteurization. He is one of our knowledge heroes, appearing in the BQ lessons to help us to explore the way scientific knowledge is often discovered by chance – and the caveat to that.

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Oreskes is an American Professor of the History of Science at Harvard University, and a specialist on earth and planetary sciences. She is one of our knowledge heroes, appearing in the BQ lessons to help us to explore why we should place our trust in scientific knowledge.

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Newton was so many things – a physicist, a mathematician, an astronomer, a theologian, and even an alchemist. He is one of our knowledge heroes, appearing in the BQ lessons to help us to explore the way scientific knowledge develops over time.

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Kuhn was an American physicist who wrote extensively on the philosophy of science. He is one of our knowledge heroes, appearing in the BQ lessons to help us to explore the way scientific knowledge develops over time.

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Hayhoe is a climate scientist who works at Texas Tech University. She is one of our knowledge heroes, appearing in the BQ lessons to help us to explore how scientific knowledge is not subject to politically-motivated interpretations.

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Along with Descartes and Newton, Galileo helped to get the scientific revolution underway, in particular with his emphasis on empirical observation of experiments as a way of ascertaining their results. He also developed Copernicus’s heliocentric theory.

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Firestein is a neuroscientist at Columbia University in New York. He runs a laboratory, and teaches various courses, one of which is devoted to the way in which ignorance is an integral element of scientific advancement. He is one of our knowledge heroes, appearing in the BQ lessons to help us to explore how science is not generally produced like the ‘scientific method’ would have us believe.

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Feynman was an American Nobel Prize-winning theoretical physicist, known for his work in quantum mechanics and particle physics. He was also one of the greatest communicators of scientific ideas. He is one of our knowledge heroes, appearing in the BQ lessons to help us to explore the difference between science and pseudoscience.

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Dawkins is probably the most famous biologist in the world, best known for his book The Selfish Gene. He has staunch opinions on superstition and religion, which he believes are actively harmful to society. He argues that one’s approach to life should be based on the scientific method.

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deGrasse Tyson is an American astrophysicist, author, and science broadcaster. He is one of our knowledge heroes, appearing in the BQ lessons to help us to explore the nature of knowledge within the natural sciences, and the role science plays in society.

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Darwin was a British geologist and naturalist, and possessor of one of the greatest minds in history. His theory of evolution is one of the most important bases of scientific knowledge, but he is also interesting for the strong faith he held early in his life, which he was forced to question due to his discoveries.

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Critchlow is a British scientist, writer and broadcaster. Her work focuses on cellular and molecular neuroscience. She is one of our knowledge heroes, and appears in the BQ lessons to help us explore how knowers are affected by bias as they seek to understand the world.

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Cox is an British particle physicist who works at Manchester University. He is one of the best known communicators of science working in the media. He is one of our knowledge heroes, appearing in the BQ lessons to help us to explore how the natural sciences do not deal with absolute certainties.

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Copernicus was the first person to present a complete version of the heliocentric theory of the universe, removing the earth from the centre of the cosmos. This idea is often cited as the best example of a paradigm shift in scientific thinking.

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Asimov (was an American science fiction and popular science writer, and professor of biochemistry at Boston University. He is one of our knowledge heroes, appearing in the BQ lessons to help us explore how knowledge within the natural sciences develops over time.

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Al-Khalili is a British-Iraqi theoretical physicist, who broadcasts regularly on British media. He is one of our knowledge heroes, appearing in the BQ lessons to help us explore how the natural sciences do not deal with absolute certainties.