Scientific American Magazine

The missile-submarine deterrents of the U.S. and the U.S.S.R. are not threatened by current antisubmarine technology. It is argued that this state of affairs should be maintained by the two powers

More than 120 celestial X-ray sources are now known; the list includes at least one neutron star, one quasar, two galaxies, one double source and perhaps even a black hole

It is well known that the author of Alice also wrote a book on symbolic logic. A sequel to that book has recently been discovered. It supports the view that his work in logic was highly original

Until recently it was believed that living matter incorporated 20 of the natural elements. Now it has been shown that a role is played by four others: fluorine, silicon, tin and vanadium

Experimental studies of plasma heating and confinement in machines based on the Tokamak design, a toroidal diffuse pinch configuration, are being conducted and planned In laboratories around the world

Children raised in an emotionally deprived environment can become stunted. The reason may be that abnormal patterns of sleep inhibit the secretion of pituitary hormones, including the growth hormone

Unusual presentations of printed matter suggest that reading is not simply stringing symbols together. A better description is that it is generating hypotheses about the meaning of the pattern of symbols

Limpets, snails, clams, scallops, sea urchins and other slow-moving sea creatures go into remarkable gyrations when they are approached by a starfish. This lively behavior enables them to deter predation