James Graham, founder of the Temple of Health, benefitted from his undeniable flair for showmanship and his talent for leaping on trends.
Lee Smolin speaks on quantum gravity, the nature of time, the role of ethics in science, and the importance of realism.
Medical authorities wrote about leeches as if they sucked blood out of the goodness of their hearts.
Feel like visiting another star system or dimension? You can do this by traveling through a black hole.