Guest host Megan Williams speaks with Tolu Olorunnipa, Molly Ball and Keith Boag about the attack at Donald Trump's campaign rally on Saturday, Kelly and Zach Weinersmith lay out the challenges that scientists and policy makers face when it comes to surviving on Mars, authors Heather O'Neill, Sarah Weinman, and Stephen Marche speak on how the literary world has been rocked by the revelation surrounding Alice Munro, and Kent Monkman and Gisele Gordon share their story of teaming up to write The Memoires of Miss Chief Eagle Testickle: A True and Exact Accounting of the History Turtle Island.

Find more at at https://www.cbc.ca/sunday