"We are also now encouraging many of these attractions to pool their marketing resources so that the benefits of visiting many different parts of the country can be promoted, " Ms Baxter said.

BBC: Science centre aims to 'steel' the show

When the game ended, the value of the pool was doubled, and the new, doubled value was divided into four equal parts and given to the players, along with the value of any tokens they had held on to.

ECONOMIST: Human evolution

The company has assembled a dream team of researchers in adult stem cells from Harvard, Stanford, the Scripps Institute and the University of Washington to pool their intellectual property and their ideas on making adult stem cells regenerate deteriorated body parts.

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Thomas Lachocki, the CEO of the National Swimming Pool Foundation, says that in order to be properly chlorinated, pools should contain 1-4 parts per million of chlorine and pH levels should be within 7.2--7.8.

CNN: Yuck! What's in your pool water