Gravity has something to do with capillary action, but what? Students using ESAs 'Take Your Classroom into Space' kit and this video recorded in the weightlessness envirnoment of the ISS can now find out. The experiment was proposed by a Belgian and Italian teachers who participated to the ESA competition 'Take Your Classroom into Space'.
http://www.esa.int/esaHS/SEM1H31OWUF_education_0.html