Related Clues:

• Elvis Costello "Little ___"
• Bohr studied them
• Teensy bits
• Extremely small amounts
• Very young guys
• Elemental material
• Supercollider stuff
• The three in carbon dioxide
• Minute bits
• Bits of matter
• Essence of everything
• Particles in supercolliders
• Wee quantities
• Teensy amounts
• Tiny physics units