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Smarter Every Day - The Drill we sent to Mars

submitted by PlayhousePals

8 years 6 months ago

Why a drill? Aha!

2 Comments

eric3579

says...

*promote

siftbot

says...

Promoting this video and sending it back into the queue for one more try; last queued Thursday, October 22nd, 2015 6:14pm PDT - promote requested by eric3579.