The diamond-rich slurry was then forced rapidly and explosively to the surface in a volcanic eruption, cooling to leave a vertical carrot-shaped 'pipe'.
When the star explodes, the gas gets so hot and is compressed so violently by the blast that it undergoes fusion, what astronomers call explosive nucleosynthesis: literally, creating heavy elements explosively.
And earlier this week, the World Health Organization declared an international public health emergency over the Zika virus, which, in it's words, is spreading explosively across Central and South America.
That would account for the 1918 outbreak's widespread distribution, but it still doesn't explain how it managed to lay low for several months before erupting so explosively at more or less the same time all over.