From Google Wave:
More than a year ago, we announced that Google Wave would no longer be developed as a separate product. At the time, we committed to maintaining the site at least through to the end of 2010. Today, we are sharing the specific dates for ending this maintenance period and shutting down Wave. As of January 31, 2012, all waves will be read-only, and the Wave service will be turned off on April 30, 2012. You will be able to continue exporting individual waves using the existing PDF export feature until the Google Wave service is turned off. We encourage you to export any important data before April 30, 2012.
If you need to keep waving, try these OpenSource projects:
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Yes, this can be very complicated. But what should a middle-school student understand about light? You see stuff in textbooks that is either wrong or just a bunch of disconnected factoids (I like the word factoid).
He of uncertain principles asks Which do you prefer: transverse waves, or longitudinal waves? The fact builder chimes in with a
Transverse or longitudinal waves, purely as a matter of aesthetic preference? Transverse all the way, of course.
So Google's cooked that turkey?