There is, so the theory goes, a new state of matter, along with gas, liquid, solid, plasma, and so on. A time crystal is an object caught in a repetitive motion that does not lose energy, which not only sounds impossible but also breaks the second law of thermodynamics.
Time crystal was first proposed in 2012, but now Google scientists claim to have used a quantum computer to demonstrate that it is possible. It’s also a convenient advert for Google’s quantum computer, called Sycamore, which is capable of making calculations that would take conventional computers millions of years.