Are Aliens Among Us?
In pursuit of evidence that life arose on Earth more than once, scientists are searching for microbes that are radically different from all known organisms
Features
The Many Worlds of Hugh Everett
After his now celebrated theory of multiple universes met scorn, Hugh Everett abandoned the world of academic physics. He turned to top-secret military research and led a tragic private life
*Supplement: The Many Interpretations of Quantum Mechanics...
Making Carbon Markets Work
Limiting climate change without damaging the world economy depends on stronger and smarter market signals to regulate carbon dioxide
* Supplement: Extended version
Puzzle: In Boxes
Our year-end crossword challenges your knowledge of science. Try the printed puzzle or a harder version.
Window on the Extreme Universe
The GLAST satellite is about to open up an unexplored region of the electromagnetic spectrum--just the region, in fact, where signs of dark matter and other mysterious phenomena may show up...
Radiant Information
State-of-the-art light microscopy illuminates the exquisite details of life
Departments
Ask the Experts
Fact or Fiction?
- From the Editor
Worlds Apart
- Letters
Letters
- Advances
Supersonic Pulse Power
Glow for the Dark
T Cell Turnoff
Losing Scents
Deadly Orbits
A Stash in Every Flush
Evolution in a Petri Dish
Updates... Whatever happened to?
Eye on the Tiger
Use It or Lose It
Not So Neutral Neutron
A Qubit Bus
Something to Remember
Punishment for Harmony
- Forum
Our Evolving Present
- Recommended
Books to Give -- Books to Get
- Skeptic
An Unauthorized Autobiography of Science
- Anti Gravity
Apples and Cheese
- 50, 100 & 150 Years Ago
Space Race--Cost of Coal--An Uncivil Club
- Perspectives
Enough Hot Air Already
- In Brief
Data Points, December 2007
In Brief, December 2007
- Working Knowledge
Progress Accelerates
- Insights
Bigfoot Anatomy
- Sustainable Developments
Meaningful Goals for Climate Talks
