July 2002

Black Holes Spin?

That's only one of several incredible new surprises about these whirlpools of darkness

by Robert Kunzig

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July

Departments

NeuroQuest

by Eric Haseltine

Bogglers

by Scott Kim

Sky Lights

Time to let go of matter—emptiness is what rules the universe
by Bob Berman

The Chemistry of . . . Blood

The first safe substitutes for blood are ready to start flowing
by Lisa Davis

Future Tech

Can Big Brother see right through your clothes?
by Ivan Amato

Letters