Turn on the evening news and it immediately becomes clear that Americans are experiencing the effects of climate change. Extreme heat and drought are affecting tens of millions of people, as floods and wildfires ravage communities from Appalachia to California. In the coming days, Congress has the…

The Covid-19 pandemic would look very different if scientists had been able to develop a treatment sooner. The death rates are likely to have been far lower, and it may have been harder for myths and misinformation to spread the way they did. In the early days of the pandemic, I expected a…