Table of Contents July 1995

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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Many physicists regarded centrifugal force less as a force than a fiction. Then a Polish astrophysicist discovered that black holes won't work without it--without it working in reverse, that is.
In theory, brain cells that have been killed by Parkinson's disease can be replaced with cells from the brains of aborted fetuses. Now that the necessary politics and the technology are in place, neurosurgeons are about to find out if that theory is correct.
Can we learn from a feline? Over millions of years, wild cats have learned how to live with a virus quite similar to one that's killing us.
Along the fault where India crashes into Asia, huge mountains arise, and huge earthquakes occur. East of Delhi lies a stretch of the fault where a major quake is long overdue. The Indian government is building a hydroelectric dam there.
Scientists of all stripes yearn for the incredibly powerful beacon of an X-ray laser. Charles Rhodes wants one so badly that he's willing to reinvent physics to get it.