Q: "Why don't physicists shield themselves from neutrinos?"
A: "Because they never see them coming."Over the past two months, we've talked more about neutrinos than ever before thanks to an extraordinary claim that neutrinos have been observed to move faster-than-light!
And as you well know, no particle is allowed to travel through spacetime faster than the speed of light in vacuum, no matter how much energy you put into it!
This is an excellent explanation of the OPERA experiment. To read more, click here.