1 Superfluidity flows from the counterintuitive rules of quantum mechanics.

2 The onset of superfluidity in materials on Earth occurs at extremely low temperatures near absolute zero, but in neutron stars, it can occur at temperatures near a billion degrees Celsius.

3 Now, two teams say they have direct evidence of such bizarre "superfluidity" in a neutron star, and other researchers seem convinced.

4 Leggett(USA). Both superconductivity and superfluidity occur at very low temperatures.

5 The quantum fluctuations, distributions, and second correlations of Cooper pairs and Josephson superfluidity in the two cases are discussed.

6 The 2003 Nobel Prize in Physics was awarded to three physicists who have made decisive contributions concerning two phenomena in quantum physics: superconductivity and superfluidity.

7 Unlike fermions, there is no limit to the number of bosons that can occupy the same quantum state, a behaviour that gives rise to the superfluidity of helium-4.

8 Now, two teams of physicists say they have more direct evidence for superfluidity in the heart of a neutron star.

9 Scientists have accumulated indirect evidence for such pairing and superfluidity.

10 These findings, to be published in Physical Review Letters, could yield deeper insights into superfluidity and also lead to especially precise navigation gyroscopes .