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Esa writes – “Here’s a huge hot air balloon made from grocery bag plastic. It generated enormous lifting power, so much that several persons couldn’t hold it down. It flew for 200km in winter even though the heating source “failed”. The balloon continued to fly being heated by the winter sun.”Link.

Phillip Torrone

Editor at large – Make magazine. Creative director – Adafruit Industries, contributing editor – Popular Science. Previously: Founded – Hack-a-Day, how-to editor – Engadget, Director of product development – Fallon Worldwide, Technology Director – Braincraft.

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