When Jadzia Dax is trying to discover the cause of the high number of accidents happening on the station, checking the solar neutrinos she discovers something unusual "...about half of them should be spinning clockwise and the other half counter clockwise." Since she notices that over 80% of them are spinning clockwise, she concludes that something is interfering with the neutrinos. Unfortunately all three known types of neutrinos have left-handed spin (anti clockwise).