WARNING:->END OF THE WORLD?

I heard that nasa had a research in solar strom in this they conformed that in the year 2012,dec 21.Strong solar storm will come,in this the magnificant + UV rays of the sun will affect the earth , that day might be end of the world or else most of the living thing's have to die,is it true?!?! answer me pls, i am really upset HMmmm..!