Table of Contents April 1993

Discover Magazine's mission is to enable readers to lead richer lives by explaining and expanding their universe.  Each month we bring you in depth information and analysis from various topics ranging from technology and space to the living world we live in.
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A half-billion years ago the remarkably complex forms of animals we see today suddenly appeared. A new bonanza of Chinese fossils may finally tell us why.
A horrific predatory little plant is beating up on fish around the world.
Gravity and subatomic forces may both arise from a fine mesh of space-time loops.
Perfect fossils from a smelly tar pit tell us what the saber-toothed cat looked like. But it's the pit's broken and mangled bones that tell us how the cat actually lived.
In California some gumshoe physicists are using a particle accelerator to nab polluters.