Atomic clocks: how they work and why they're useful 

How do atomic clocks keep time? This short animation introduces the technology of atomic clocks based on caesium - which define the world's standard second - and other elements. It has a focus on atomic clocks in Singapore, introducing the the work of A*STAR's National Metrology Centre in setting Singapore Standard Time and descrbing research on next-generation clocks at the Centre for Quantum Technologies at the National University of Singapore.