Richard P. Feynman

Quarks came in a number of varieties - in fact, at first, only three were needed to explain all the hundreds of particles and the different kinds of quarks - they are called u-type, d-type, s-type.
Quarks came in a number of varieties - in fact, at first, only three were needed to explain all the hundreds of particles and the different kinds of quarks - they are called u-type, d-type, s-type.
Rotate quotes
call  explain  fact  

These are some quotes by American author Richard P. Feynman Physicist, who lived between May 11, 1918 and February 15, 1988.