In this post-truth era we live in, the validity of facts from climate change and evolution to the shape of the earth and even vaccine safety is challenged by misinformation. As scientists,we should make greater efforts to engage with the public and to counter misinformation through publicising correct information on social media as well as through traditional publishing channels. We can all start with our friends, family, and colleagues. As scientists,we have a responsibility to speak knowl - edgeably on scientific issues that affect us all.