Liquid nitrogen is colourless, odourless and inert, and that is exactly why it is underestimated. What LN2 is, the hazard that actually causes fatalities, and the handling discipline professional facilities live by.

In cattle breeding, frozen semen waits for the cow. In horse breeding, everything waits for the mare. Why frozen stallion semen is the most time-critical cargo in cryogenics, and how the cold chain holds.