Bitcoin trader Kolin Burgesas he protests against Tokyo-based bitcoin changer MtGox
Bitcoin trader Kolin Burgesas he protests against Tokyo-based bitcoin changer MtGox - 

It's time for Silicon Tally. How well have you kept up with the week in tech news?

This week's guest joins us from the BBC. Jon Stewart is the host of "Science in Action," a weekly radio show covering the latest in science news.

Follow Mark Garrison at @GarrisonMark