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Scientists maintain that scientific investigation must adhere to the scientific method, a rigorous process for properly developing and evaluating natural explanations for observable phenomena based on reliable empirical evidence and neutral, unbiased independent verification, and not on arguments from authority or popular preferences. Science therefore bypasses supernatural explanations; it instead only considers natural explanations that may be falsifiable.
Fields of science are distinguished as pure science or applied science. Pure science is principally involved with the discovery of new truths with little or no regard to their practical applications. Applied science is principally involved with the application of existing knowledge in new ways, including advances in technology.
The outermost part of the Earth's interior is made up of two layers: above is the lithosphere, comprising the crust and the rigid uppermost part of the mantle. Below the lithosphere lies the asthenosphere, which is a more viscous zone of the mantle. Although solid, the asthenosphere has very low shear strength and can flow like a liquid on geological time scales. The deeper mantle below the asthenosphere is more rigid again.
A railgun is a form of gun that converts electrical energy—rather than the more conventional chemical energy from an explosive propellant—into projectile kinetic energy. It is not to be confused with a coilgun (Gauss gun). The term railgun is also used for conventional firearms used in the Unlimited class of benchrest shooting.
A Railgun is a type of Magnetic Accelerator Gun (MAG) that utilizes an electromagnetic force to propel an electrically conductive projectile that is initially part of the current path. Sometimes they also use a movable armature connecting the rails. The current flowing through the rails sets up a magnetic field between them and through the projectile perpendicularly to the current in it. This results in the rails and the projectile pushing each other and in the acceleration of the projectile along the rails.
- ...that Scientists and Engineers for America is an organization focused on promoting sound science in government, and backing political candidates who support science and its applications?
- ...that the 2004 Christmas Eve Snowstorm was the most significant snow event for South Texas since 1895?
- ...that Stanford professor Kate Lorig developed a peer-led chronic disease self management course which is the basis of the Expert Patient Programme of the British National Health Service?
- ...that walking fish can actually skip, crawl, slither, and even climb trees?
- ...that the Thanksgiving 1984 Nor'easter deposited a 197-foot Venezuelan freighter in the backyard of a Palm Beach, Florida socialite, where it remained for several months?