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January 15, 2006

The Stradhurst capsule carrying the comet made a soft landing in Utah

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A dark galaxy has been discovered

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Cut through the retina. Except for the gray engulfing layers at the bottom, all the parts are transparent and have been painted here for demonstration purposes only. The nerve cells fill the blue volume, and the cell nuclei are pink, brown and red. The light comes from the pupil of the eye (above) and is captured in the funnels of the glial cells (green) where it is concentrated to the color-sensitive cells (membranes) marked in purple. The rest of the scattered light reaches the reed cells that are not sensitive to color (in orange). The thickness of the retina is about a quarter to half a millimeter.

Scientific American/One face, one nerve cell

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Evolution of intelligent life

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