From physics to biology to neuroscience, channel your inner Mr. Wizard as you watch these talks. Join NASA astronauts, scientists and engineers on a brand new adventure each week — all you need is your curiosity.

Scientific American maintains a strict policy of editorial independence in reporting developments in science to our readers. Explore our digital archive back to 1845, together with articles by more than one hundred fifty Nobel Prize winners.

For Kuhn, acceptance or rejection of a paradigm is a social process as a lot as a logical course of. The belief that scientific theories ought to and do characterize metaphysical actuality is known as realism...

Having turn out to be a mass profession, science was no longer suspected of changing into elitist and separated from the life and issues of strange individuals. Henrietta Leavitt, a professional human computer and astronomer, who first revealed the significant relationship between the luminosity of Cepheid variable stars and their distance from Earth. This allowed Hubble to make the invention of the expanding universe, which led to the Big Bang theory.

For Kuhn, acceptance or rejection of a paradigm is a social process as much as a logical course of. The perception that scientific theories ought to and do symbolize metaphysical actuality is called realism...