One of the persistent challenges of manned space exploration is that pesky lack of oxygen throughout much of the universe. Here on Earth, trees and other plant life do us a real solid by taking in our bad breath and changing it back to clean, sweet O2. So what if we could take those biological oxygen factories into space with us, but without all the land, sun, water, soil, and gravity that forests tend to require? This is the point where NASA and Elon Musk should probably start paying attention. Royal College of Art graduate Julian Melchiorri has created the first man-made, biologically functional leaf that takes in carbon dioxide, water, and light and releases oxygen. The leaf consists of chloroplasts -- the part of a plant cell where photosynthesis happens -- suspended in body made of silk protein. "This material has an amazing property of stabilizing (the chloroplast) organelles," Melchiorri says in the video below. "As an outcome I have the first photosynthetic material that is living and breathing as a leaf does." via CNET.
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