This mosaic image of Io, the innermost of Jupiter’s four Galilean moons, was made by the solid-state imaging camera aboard NASA’s Galileo spacecraft during a close flyby last July. The colors, captured with green, violet, and near-infrared filters, approximate what the eye would see. Slightly bigger than our own moon, Io is the most volcanically active body in the Solar System. Its yellow, sulfurous veneer is pockmarked with active volcanos. The story on page 20 reports the recent discovery of an enormous lava fountain near Io’s North Pole.

The Road to the Neutrino
It took experimenters three decades to convince themselves that the b-decay spectrum really is continuous. Then, to save conservation of energy, Pauli had to invent the neutrino. -- Allan Franklin

Negative Pressures and Cavitation in Liquid Helium
When subjected to intense sound waves, liquids can be stretched until they break and gas bubbles appear -- Humphrey Maris and Sebastien Balibar

Physicists Triumph at ‘Guess My Number’
Quantum entanglement looks like telepathy when three physicists get together on a game show -- Andrew M. Steane and Wim van Dam

Physics Update

Reference Frame
Brainwashed by Feynman? -- Philip W. Anderson

Letters

Search and Discovery
Creating and characterizing individual molecular bonds with a scanning tunneling microscope . . . Researchers perform quite a magic trick: making nickel-48 materialize . . . Galileo flyby discovers immense lava fountain on a Jovian moon

Minneapolis Will Host the APS March Meeting

Washington Reports
Richardson sends nuclear security agency plan to Congress, but dual roles provoke questions . . . Los Alamos director talks about security problems, morale, and recruiting young scientists at lab . . . Washington briefings: US pays up UN arrears but leaves out UNESCO; Removing sanctions on India still perplexes Argonne

Physics Community
Trans-Alps neutrino beam gets CERN go-ahead . . . Korean neutrino observatory axed . . . Middle East synchrotron project moves ahead . . . In Brief

Web Watch

Books
Walther Nernst and the Transition to Modern Physical Science, D. K. Barkan (reviewed by H. Kragh) . . . Greenhouse: The 200-Year Story of Global Warming, G. E. Christianson (reviewed by M. Battle) . . . The American Astronomical Society’s First Century, edited by D. H. DeVorkin (reviewed by M. S. Roberts) . . . The Five Ages of the Universe: Inside the Physics of Eternity, F. Adams and G. Laughlin (reviewed by J. I. Silk) . . . The Touchstone of Life: Molecular Information, Cell Communication, and the Foundations of Life, W. R. Loewenstein (reviewed by R. H. Austin)

New Products
Focus on magnetism

We Hear That

Obituaries
Henry Way Kendall . . . Stanley Geschwind

Information Exchange

Current Contents	Past Contents	Buyer's Guide
Job Ads	Upcoming Meetings	About PT
Subscribe	Contact Us	PT Home
Advertising Information	Web Watch

© 1999 American Institute of Physics