Understanding cause-effect relationships between variables is of primary interest in many fields of science. The standard method for determining such relationships uses randomized controlled ...

At this moment, a spacecraft containing the means for astronauts to set fire outside the International Space Station is rocketing into outer space. The spacecraft is an Orbital ATK Cygnus spacecraft, ...

This is a preview. Log in through your library . Abstract On the basis of a 10-year record of rawin observations in the Caribbean, experiments were carried out to determine the appropriate matching ...

Tropical cyclones -- known as typhoons in the Pacific and as hurricanes in the Atlantic -- are fierce, complex storm systems that cause loss of human life and billions of dollars in damage every year.

A natural experiment is an empirical study in which individuals (or clusters of individuals) are exposed to the experimental and control conditions that are determined by nature or by other factors ...