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{{B}} Changes of Museums{{/B}}
{{U}} (46) {{/U}} They are no longer places for the privileged few or for bored vacationers to visit on rainy days.
{{U}} (47) {{/U}} Some of the old, gray museums have been rebuilt, and the newer ones are open and modern in their architecture. Inside, there is modern lighting, color, and sound. Instead of displaying everything they own, museum directors show fewer objects and leave open spaces where visitors can gather and sit down. They also bring together in one display a group of objects drawn from various parts of the museum in an effort to represent the whole lifestyle of a region or a historical period. {{U}} (48) {{/U}}.
More and more, museum directors are realizing that people learn best when they can somehow become part of what they are seeing. In many science museums, for ex

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{{B}}Don’t Rely on Plankton to Save the Planet{{/B}}
Encouraging plankton growth in the ocean has been touted by some as a promising way to remove carbon dioxide from the atmosphere.{{U}} (46) {{/U}}.
Adding iron to patches of ocean can make plankton bloom temporarily. The microscopic organisms suck up dissolved carbon dioxide from the water, which in turn is replaced by carbon dioxide from the air.{{U}} (47) {{/U}}.
Jorge Sarmiento from Princeton and his colleagues developed a complex computer model to analyse how factors such as ocean chemistry and water circulation would affect the process if 160, 000 square kilometres of ocean were seeded with iron for a month.{{U}} (48) {{/U}}.
In their scenario, which covers an area 10 times as big as the largest experiment of this kind ever proposed, fertilising the ocean re

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