I have seen videos online about how dangerous strange matter is... which is something I have never understood since strange matter created in a lab always disappears very quickly.   However I watched a video today about the continent of stability at around 300 daltons.  At 315, the protons and neutrons break down into U and D quarks, making the nucleus free quarks...  Supposedly any matter that touches this atom breaks down into U and D quarks and is added to the nucleus.  Also supposedly this matter is stable at room temps and pressures.    

I cannot find the paper online to support this....  Has anyone read this paper and if so, what are your thoughts?