sourbluefreezy:

iopele:

theconcealedweapon:

just-shower-thoughts:

Due to the evolution of bacteria with respect to our bodies natural defense mechanisms, traveling forward in time could kill you, and traveling back in time could kill everyone.

I never thought about this but it makes perfect sense.

epidemiology fascinates me and this post is just so cool to me

what if the black plague and spanish flu outbreaks were caused by some asshole time traveller