The geekiest signs from the 'Stand up for Science' rally

At a rally full of scientists, things were bound to get a bit geeky.
On Sunday, thousands scientists and supporters gathered in Boston's Copley Square to "stand up for science" under the Trump administration. 
Their signs were, predictably, quite clever. My favorite sign so far#standupforscience pic.twitter.com/2pSlU5UPdz
— Tomas Green (@TomasWGreen) February 19, 2017
I can't tell you how many older people have come up to me today to say, "I remember polio. Thank you." #standupfo