Volume 270, Issue 5
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Features
Evidence for a Biological Influence in Male Homosexuality
Two pieces of evidence, a structure within the human brain and a genetic link, point to a biological component for male homosexuality
The Biological Evidence Challenged
Even if genetic and neuroanatomical traits turn out to be correlated with sexual orientation, causation is far from proved
Bohm's Alternative to Quantum Mechanics
This theory, ignored for most of the past four decades, challenges the probabilistic, subjectivist picture of reality implicit in the standard formulation of quantum mechanics
How Interferons Fight Disease
They are not the cure-alls researchers once hoped they would be, but they are providing therapy for a variety of infectious illnesses and for some cancers
Chesley Bonestell's Astronomical Visions
This artist's unique combination of technical knowledge and graphic prowess brought astronomy alive and helped to advance the manned spaceflight program
Directional Drilling
New techniques enable crews to drill around natural or man-made obstructions for oil and gas. These same methods are used to sample underground pollutants and bury service lines
East Side Story: The Origin of Humankind
The Rift Valley in Africa holds the secret to the divergence of hominids from the great apes and to the emergence of human beings