Physicist Anne Schukraft of Fermi National Accelerator Laboratory explains. Video of 5SniR5U6YTU Have a burning question about particle physics? Let us know via email or Twitter (using the hashtag #AskSymmetry). We might answer you in a future video! You can watch a playlist of the #AskSymmetry videos here. You can see Anne Schukraft's answers to readers' questions about neutrinos on Twitter here. Follow Print Facebook Twitter Reddit Hacker News Use your browser’s print dialog box to create a pdf.