A joint Fermilab/SLAC publication
Hands hold galaxies in the palm of their hands with dark matter particles swirling around
Artwork by Sandbox Studio, Chicago with Ana Kova

An international celebration of dark matter


Around the world, scientists and non-scientists alike celebrated the first international Dark Matter Day.




This year, October 31 was more than just Halloween. It was also the first global celebration of Dark Matter Day. In 25 countries, 11 US states and online, people interacted with scientists, watched demonstrations, viewed films, took in art exhibits and toured laboratories to learn about the ongoing search for dark matter. 

Symmetry has collected a series of photos from participants around the world. Check out how people celebrated Dark Matter Day and download a commemorative dark matter poster (to be printed using visible matter).

Download the poster

Dark Matter Day Poster
Artwork by Sandbox Studio, Chicago with Ana Kova