Between 33 seconds & 93 seconds!
And UK taxpayers funded research too stupid even for an IgNobel Award contender.
http://iopscience.iop.org/article/10.1088/1748-9326/11/2/024008
And UK taxpayers funded research too stupid even for an IgNobel Award contender.
http://iopscience.iop.org/article/10.1088/1748-9326/11/2/024008