Looking back one, two and five years ago today on Worldchanging:

2009
"The Rocketship Wonder of Earlier Decades is Gone"
Alex Steffen provides a great round-up of the talks at worldchanging ally and writer Geoff Manaugh's London conference, Thrilling Wonder Stories. Here are some interesting tidbits...

2008
How to Get Off Coal
Jim Hansen outlines three things we need to address in order to phaseout coal...

2005
Kabul Snapshots
Alex Steffen shares links to a Danish woman's blog and Flickr photo set from her life in Afghanistan, and notes her disturbing, yet informative, creation of a "kidnapping kit"...

Other recent "look backs":
May 26
May 27
May 28