Scientists created a clock so accurate that it measure space-time

Einstein in his general theory of relativity has said that space and time are not distinct unrelated things but they exists in 4 dimensional space time continuum.At our scale we feel our time is uniformly flowing but if the speed of the object increases it's time dilates.Time measurement is done using some oscillations like Earth's rotation or simple pendulum but atomic clocks use oscillations of atoms.



The new atomic clock created is based on the frequency of vibration of ytterbium atoms and it measures time with the accuracy of 10^-18 order.To measure such a high frequency lasers are used.This clocks are reproducible and due to thermal and electromagnetic shielding there is no other effect which can change our time.
 
                               

As predicted  by Einsein's theory of relativity, The stronger the pull of gravity, the slower the vibrations of atoms and the passing of time. This effectively means that the clocks are showing not simple time, but also their distance from a center of gravity. They're effectively measuring the space-time continuum.


New clocks could potentially be used to perfectly measure the Earth's shape,since gravity gets stronger as you get closer to Earth's core. We can also measure tiny difference in time due to variation of gravity on the surface of the earth.

AT LAST,WE JUST WANT TO SAY, The clocks' sensitivity to gravity also means in the theory that they could be used to detect the presence of dark matter is, but we know it distorts gravity, and so these clocks could potentially pick up on it.