The ACB said the positive test had been triggered by fluid reduction medication, which Warne claimed was not performance-enhancing.

BBC: Warne out after failed drugs test

Not only does a tiny test tube require far less fluid, it can also speed reactions, because all the molecules are so much closer to each other.

FORBES: A hail of silver bullets

The research could help test simulations of how the outer, fluid core generates the Earth's magnetic field, which shields our planet and the teeming life on it from harmful cosmic rays.

BBC: NEWS | Science/Nature | Earth's core runs ahead of crust

But they can test for it in other patients by watching how their spinal fluid acts on GABA in a laboratory setting.

WSJ: Unraveling the Riddle of Too Much Sleep

Hurst had previously performed a test in his garage, in which he poured charcoal-lighter fluid on the concrete floor, and lit it.

NEWYORKER: Trial by Fire