Now You Know: What is Radioactivity?

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Uploaded by on Apr 14, 2011

Thousands of tons of radioactive water have entered the Pacific Ocean from the crippled Fukushima nuclear plant in Japan. What is radioactivity? How does an element become radioactive, and when does it become a danger to life? Todd Grosshans answers these questions in this edition of Now You Know.

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  • nwo disaster!!!

  • No problems just fluffy marshmellows.

  • This is so much bullshit. The japanese people will have effects from this radiation for generations, and the oceans may not recover ever. I don't believe this, and you shouldn't either.

  • uranium bullets for the win! 

  • This looks like bullshit,I mean why do all these guys who say there is nothing to worry about work for the nuclear industry, who am I supposed to believe, this guy and the government, it is a level 7 and it could take months to fix, give me a freakin break.

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