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...changes in light, while the right pupil does. So Bowie’s left eye often appeared to be quite dark, due to the blackness of his dilated pupil, when compared to the blue of his right iris. The dilated pupil of his left eye was also potentially more prone to the effect of “red eye”. This sometimes adds to the appearance of a different colour when contrasted to his...

...changes abound, but you don't hear much about the new observations made by Chilean astronomers, or the study in Yucatán, Mexico, that is bringing us closer to the causes of the dinosaurs’ disappearance. Under the hashtag #CienciaLatina, there's an initiative to spread scientific news on networks created by scientists of the region. Its objective is to create and expand...

...changes in atmospheric pressure, are more than enough to swamp the tiny difference between normal tide and supermoon tide on any day. If you were to measure the Moon’s apparent diameter on the night of a supermoon, it would be less than a tenth more than the average. You aren’t going to notice this just by looking. Other effects, such as the well-known “moon...