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(Photo credit: NASA/Ames Research Center/W. Stenzel/D. Rutter)From centuries of studying the planets within our solar system, astronomers have wondered...

>> from his study of art history, allen knew that medieval artists already used an optical device called a camera obscura. >> camera obscuras worked exactly like a human eye. what we have here is a box which is sealed. no light can enter into it except through this big hole over here. like a human eye, there is a lens. whatever is outside this box is focused through this lens and forms an image on the back wall of the camera, but it's inverted. in other words, it's upside down. >> the lens at the front of the camera ensures a sharp image is projected on the back wall. >> we know for a fact thi...

Everything already. >> from his study of art history, allen knew that medieval artists already used an optical device called a camera obscura. >> camera obscuras worked exactly like a human eye. what we have here is a box which is sealed. no light can enter into it except through this big hole over here. like a human eye, there is a lens. whatever is outside this box is focused through this lens and forms an image on the back wall of the camera, but it's inverted. in other words, it's upside down. >> the lens at the front of the camera ensures a sharp image is projected on the back wall. >> we...

Capturing the invisible light. >> ubiquitous energy isn't the first to develop solar glass. others have combined glass with solar cells that are thinner and smaller, but they could have drawbacks like lower power efficiency. yubiquitous developed a solar coating from dyes designed to match the transparency of standard windows. >> light-absorbing dyes are found all around us. we've engineered those dyes to absorb infrared light and also convert that light into electricity. >> and that's key because infrared light is invisible to the human eye. the result is solar glass that delivers the best co...

In the atmosphere. and then that led me to read about the atmosphere. what you realize pretty quickly, the atmosphere is like the human eye in the sense that it is a miracle that it exists. and it is one of the top three pre conditions for life, for the entire existence of planet earth. now at this point, when i'm reading about this, my wife is really sick of me. my daughters are now avoiding me at this point. but i'm scared. i'm legitimately frightened and i get to the place you're talking about. how do you express this without seeming crazy? >> it was such a fun night. they were fascinating ...