As humans age, the corneas in their eyes start to thicken, causing effects on their vision similar to yellowing.
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It is easier and more energy efficient to pump water from below (normal pump) than to try and draw it up from above (using a vacuum pump).
Balls roll in elliptical pathways around the dish, until they fall into the 'gravity well's' central hole.
Join BJ and Dion from Science Time, as they talk all about 'Dinosaurs'.
Szilassi polyhedrons have a special topology.
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