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The supplementary materials, including 2 videos showing printing in real-time (keep watching, they slow down), are available without a subscription:

http://www.sciencemag.org/content/suppl/2015/03/16/science.a...

Movie 1: http://www.sciencemag.org/content/suppl/2015/03/16/science.a...

Movie 2: http://www.sciencemag.org/content/suppl/2015/03/16/science.a...

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I didn't see in the supplementary materials, does anybody know if they are using a pressurized air or oxygen source to increase oxygen flow through the membrane? edit: to repond to my own Q: they can use both pressurized oxygen and pressurized air. Using pressurized air decreases the dead zone but still very workable.

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