The first postulate of natural selection states that individuals within a population are not identical; they exhibit variation in their traits. This variation is the raw material upon which natural ...

In the double slit experiment, quantum objects such as photons or electrons are beamed through two closely spaced slits. Since we don't know which slit each object passes through, the possibilities ...

Modal interpretations of quantum mechanics admit two kinds of state: physical states, which specify the values of observables on a system, and theoretical states, which specify a probability ...

Measurement postulate is crucial to quantum mechanics. If we measure a quantum system, we can only get one of the eigenvalues of the measured observable, such as position, energy and so on, with a ...

In his criticism of scientists who find Koch's postulates obsolete,1 Todd Miller overlooks one important point. Recruiting volunteers to apply Koch's postulates to diseases such as Ebola fever and ...

In 1988, I was asked to summarize a symposium on the then relatively new field of microbial pathogenesis and to comment on the contributions of molecular biology and genetics to the study of bacterial ...