The hard problem of consciousness is the question of why and how physical processes in the brain give rise to subjective experience, the felt quality of what it is like to see red, taste coffee, or feel pain. It is one…
Evolution by natural selection is the scientific theory that explains how the diversity of life arose and continues to change. It holds that organisms vary, that some of this variation is inherited, and that individuals…
That tobacco smoking causes cancer is one of the most thoroughly established findings in all of medicine. Smoking is the leading preventable cause of cancer and of death worldwide, responsible for the great majority of…
Snowball Earth is the hypothesis that, on one or more occasions in the distant past, our planet froze over almost completely, with ice reaching from the poles all the way to the equator. It is a dramatic and influential…
Phrenology was a popular nineteenth century practice that claimed a person's character and mental abilities could be read from the shape and bumps of their skull. It was widely embraced for decades, taught, charged for,…
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From the Big Bang to you13.8 billion years on one board: nine chapters, over fifty capsules, and the questions still open at every step. Follow the threads from the first instant to the first cities.54 capsulesby Emmanuel Okwu