Wherever you go today, don’t forget your towel! Today is Towel Day, a date set aside to remember author Douglas Adams and his works, particularly The Hitchiker’s Guide to the Galaxy. For the occasion, the astronauts of the European Space Agency (ESA) show how they celebrate on the International Space Station. Astronaut Samantha Cristoforetti (previously at Neatorama) reads about the importance of the towel from The Hitchiker’s Guide to the Galaxy while floating in space. Don’t panic!