Among the highlights:

Almost half (or 48 percent) of all DNA on the subway’s surfaces matches no known organism

Hundreds of species of bacteria are on the subway. But don’t worry, the bacteria are ‘mostly harmless.’

Among the identified organisms — ‘1,688 bacterial, viral, archaeal, and eukaryotic taxa, which were enriched for harmless genera associated with skin.’

Perhaps most interesting, one subway station flooded in Hurricane Sandy ‘still resembles a marine environment.’