Gravity Probe B

You should pay attention to press information about Gravity Probe B, which is launching this week. It is one of the most dramatic space experiments ever. This was an idea which began in 1959, and which has gone over budget so many times that it was cancelled -- fully killed -- and then revived no less than seven times.

But, once it is done, it will have demonstrated one of the fundamental predictions of general relativity -- frame dragging.