4. International Science Festival Gothenburg
We are continuing our list of biggest science festivals around the world with The International Science Festival in Gothenburg that is one of Europe’s leading science events with over 70,000 visitors, according to their website. The festival includes hundreds of activities and it first took place in April 1997. Similar to other science festivals, the purpose is to communicate science to the public in an easy and interesting manner. This is the most popular science event in Sweden and one of the largest science festivals in Europe.