Question

What is the most accurate clock?

Answer 1

The most accurate clock in the world is the ATOMIC CLOCK CAESIUM  
UNTIL NOW 
BUT
in a new invention scientists have discovered A SUPER IONIC CLOCK WHICH CONTAINS YTTERBIUM IONS WHICH IS NOW TAKING THE PLACE (OF THE MOST ACCURATE CLOCK IN THE WHOLE WIDE WORLD .As per the inventors said the clock would n't even lag or gain a second in the past present and future