In science news around the world, just days after the Democratic Republic of the Congo celebrated the defeat of an Ebola outbreak, a new one begins in a different part of the country, an armed conflict zone where health workers will have difficulty working safely. California records its largest forest fire in state history and Europe endures a series of heat waves, events influenced by human-induced global warming. Arizona State University (ASU) in Tempe concludes that physicist Lawrence Krauss grabbed a woman’s breast at a 2016 conference, violating ASU’s sexual harassment policy. Canada unveils the country’s first science integrity policy, intended to reinforce the right of government scientists to speak about their work to the media. The Fields Medal, often called the Nobel Prize of mathematics, is awarded to four prominent young mathematicians; the International Mathematical Union gives out the awards every 4 years to mathematicians age 40 or younger.