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On the Cover

March-April 2007 Volume 95, Number 2

The slime mold Dictyostelium discoideum has served as the testing ground for mathematical modeling techniques in biology. This image simulates a pattern formed when Dictyostelium cells, in the face of starvation, abandon their existence as free-living amoebas and aggregate. ...


FEATURE ARTICLES

Plug-in Hybrid Vehicles for a Sustainable Future

Andrew Frank

Appropriately designed hybrid cars will help wean society off petroleum. The necessary technology is available now


Uncovering Prehistoric Hurricane Activity *

Kam-biu Liu

Examination of the geological record reveals some surprising long-term trends


Amber's Botanical Origins Revealed *

Jorge Santiago-Blay, Joseph Lambert

Large collections of the substances exuded by trees today may help to track backward from amber samples to the ancient plants that produced them


Multiscale Modeling in Biology *

Santiago Schnell, Ramon Grima, Philip Maini

New insights into cancer illustrate how mathematical tools are enhancing the understanding of life from the smallest scale to the grandest


Imprinted and More Equal *

Randy Jirtle, Jennifer Weidman

Why silence perfectly good copies of important genes? The answer may lie in a battle between mother and father staged in the genome of their offspring


* access restricted to members and subscribers


SCIENTISTS’ BOOKSHELF

Defending Darwinism

Richard Bellon

A review of Darwinism and Its Discontents, by Michael Ruse. Ruse confronts those who treat Darwin's theory with suspicion, squeamishness or malign neglect and defends Darwinism from its false friends

See all book reviews for this issue.


DEPARTMENTS

COMPUTING SCIENCE

Trains of Thought

Computing with locomotives and box cars takes a one-track mind

Brian Hayes

MACROSCOPE

An Exact Value for Avogadro's Number

Untangling this constant from Le Gran K could provide a new definition of the gram

Ronald F. Fox, Theodore P. Hill

SIGHTINGS

Picturing to Learn

The Inner Life of the Cell is an eight-minute animation from Harvard's Biovisions Initiative

Felice Frankel

MARGINALIA

By Any Other Name

By giving tumors their right names, scientists gain power over them

Robert Dorit

ENGINEERING

Lab Notes

A theoretician develops his applied side

Henry Petroski

SCIENCE OBSERVER

Ice Entwined

Frozen water takes on intricate multi-helixed shapes when confined in tiny spaces at high pressures

Fenella Saunders

Banking on Mitigation

New regulations might change the landscape of national wetlands policy

Amos Esty

Sensitive Cells

Stem cells take their cue from their physical surroundings

Christopher R. Brodie

In the News

LETTERS TO THE EDITORS

The Tipping Point
Ancient Blow-ups
Ears in Space
Fooling Around
Flowing Along

SIGMA XI TODAY (PDF)


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