Actual title: "How to make a vortex of semen"

Yeah, you read that right.


Excerpt:

"Depositing a fresh semen sample in an annular shaped microfluidic chip leads to a spontaneous vortex state of the fluid at sufficiently large sperm concentration. The rotation occurs unpredictably clockwise or counterclockwise and is robust and stable."

How to make a vortex of semen

The next thing I'm thinking we're going to see is a porn Web site entitled "The Vortex of Semen".