Scientists are exploring a new type of optical atomic clock based on ytterbium-173 ions that could help define the future standard for measuring time.

Will birthdays go the way of the Betamax and Blackberry? Our culture is always eager to move away from old things toward new things and these days if you want to know how old you are, the number of ...

Scientists from the Chinese Academy of Sciences and Monash University report that they have developed a new method to measure biological aging in individual cell types. The new tool offers a more ...