The field of physics has expanded exponentially in the last few centuries, but scientists still grapple with a number of problems and questions that remain unsolved. Several of these problems are theoretical: they involve observed phenomena that existing theories seem incapable of explaining. Others are experimental: they concern theories that do not lend themselves to [...]

Raw foodism is a lifestyle involving the consumption of uncooked, unprocessed, and often organic foods as a large percentage or the entirety of one’s diet. Raw foodists vary in the extent to which they eat raw foods like fruits, vegetables, nuts, seeds, eggs, fish, meat, and even unpasteurized dairy products, such as milk, cheese, and [...]

Catch-22 is a term coined by Joseph Heller in his novel of the same name to describe a situation in which a desired outcome is impossible to attain. Heller’s prototypical Catch-22 concerns the sanity of military pilots. Basically, since combat missions are so dangerous, those who fly them must be insane and should be grounded. [...]