Joseph McQuade on why Canada owes child soldier Omar Khadr $10.5m for its failure to protect him
Victoria Herrmann on why it is important to bring sceptics into discussions about climate change.
Georgiana Epure argues that the next UK government needs to live up to its global responsibilities on preventing mass atrocities.
Toor Pekai Yousafzai spoke about her role as mother to daughter Malala at a recent Gates Cambridge event.
This weekend's March for Science is making scientists question their relationship with issues outside the lab.