The ups and downs of helium
June 4, 2006 1:23 PM Subscribe
LBJ and the helium filled astronaut. In 1964, the Skylab project wanted to send a phone call to the president. They had a hard time convincing the operators to put the call through. (g2 real audio link from npr) But today, 2 college students in florida discovered that helium can be dangerous.
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