We are committed to provide all the material for free under a creative commons by-nc-nd license. But maintaining and expanding this project requires time and resources. If you like what you see, please help us by making a contribution.

Donations are managed by Pompeu Fabra University and all funds will be exclusively devoted to the development of this project.

If you’d rather donate your time and would like to collaborate in developing new experiments or improving current ones, please send us a message to humberto.llavador@upf.edu or m.giamattei@berlin.bard.edu.