![[IOP]](http://images.iop.org/cws/icons/themes/phw/colophon-small.png){kind=icon}
Print edition: September 2009
Features
Engineering the climate
Geoengineering has so far been something of a taboo topic for climate scientists. Peter Cox and Hazel Jeffery explain why it is now time to take it seriously
Less reality, more security
New results in quantum cryptography show that the original protocol based on Bell's inequality is so powerful that it extends beyond the quantum realm. Artur Ekert traces it all back to Einstein's insights about physical reality
Of gluons, atoms and strings
An unusual alliance between physicists who study ultrahot plasmas and ultracold atoms is yielding intriguing results – and may even lead to an experimental test for string theory, as Barbara Jacak reveals
Quanta
Rap riposte
Taik no chances
Launch your own space kit
An amazing tribute
Frontiers
Stepping up to quantum computing
The flaw in Planck's law
New-found order in the valleys
Fish swish the oceans
Singing oven SCOREs in the developing world
News & Analysis
Beleaguered LHC gears up for restart
Europe unveils plans for UK space base
Renewable energy boosted by US stimulus cash
Nortel sheds staff as bankruptcy bites
Spain opens world's largest telescope
Giant facilities edge closer to reality
Changes needed at European council
Portugal opens novel nanotech lab
Focused papers get more citations
Hawking receives top US award at White House
Free audio archive brings legends to life
Voyager heads for interstellar space
The neutrino hunter
Row bubbles up over particle prize
Editorial
Plan B for climate change
Techniques to manipulate the Earth's climate are now rightly entering mainstream debate
Forum
Illuminating physics for students
David Griffiths says that the role of a physics teacher should be to illuminate the subject's intrinsic interest, beauty and power – and warns that attempts to make it more marketable using gimmicks, false advertising or dilution are bound to be counterproductive
Critical Point
Your best unit
Robert P Crease discusses the origin of some units of measurement, and asks for your favourites
Feedback
Medical imaging at risk from European directive
Caught CAT-napping
Remembering Salam
Comments from physicsworld.com
Language lore
Last call for units
Reviews
Unsolved mysteries of the universe
Astronomy dominates
Puzzling physics
A new time machine
All hail the telescope
Careers
A physicist's life-cycle
Long-term career satisfaction for academics is closely linked to the type of institution where they work, as Joseph C Hermanowicz discovered when he set out to follow physicists through their careers
Careers and people
Lateral Thoughts
Schrödinger’s dog
