Galaxies like Toilet Flushes Spin Left or Right

Polar plot of net asymmetries A in 30° sectors in right ascension and slices in z. Segments with positive A are indicated in red and negative A in blue. [blue are left hand spinning and red are right hand spinning] The A for segments with
The handedness preference was previously seen in an analysis of over 2600 nearby spiral galaxies and now in an analysis of 15,000 more.