Thousands of people rallied to join the March for Science in Vienna on Saturday, April 22.
Police estimated that 1,600 had joined the march, while organizers put the number at 3,000, according to local reports.
This video shows demonstrators gathering and then marching on the city center.
Crowds gathered in towns and cities worldwide to protest against negative political interference in scientific research and development. The marches coincided with Earth Day.
