Science: Strontium 90 in Japan

U.S. daily press reports have indicated that radioactive strontium 90 from the fallout of thermonuclear explosions is nothing to worry about. Japanese scientists do not agree. On April 8 scientists working under Japan's Atomic Energy Commission will present a report to the United Nations Radiation Committee. Its gist: strontium 90 should be studied carefully, and much more must be known about it before it can be written off as harmless to the human species.

The Japanese scientists tested a long list of objects, from spinach to deer horns, for strontium 90, and found a...

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