What's the best reason to observe the 2012 Transit of Venus? It could be history. Today's story from Science@NASA recounts one explorer's role in "the Apollo program of the 18th Century."
The full story can be found here: http://science.nasa.gov/
A companion video is posted below and can also be viewed at: http://www.youtube.com/watch?
(Sorry, but this looks like a duplicate video from NASA)