The 2013 Boston Marathon bombing was a major event in the US. The tragic attack then became the subject of one the biggest manhunts in online history. 

Leonardo DiCaprio has been stealing hearts since the '90s. But next to his acting, he has also been an environmental activist. To this day, his online posts encourage others to change the world. Can such a famous actor honestly be an activist?

Greta Thunberg became well-known after she went climate striking one Friday in 2018. Thanks to digital media, she has become the catalyst for a global movement that inspired teenagers across the world to start climate striking.