Returning to designs abandoned in the 1970s, start-ups are developing a new kind of reactor that promises to be much safer and cleaner than current ones.
COMIC: Do forests warm or cool the Earth? What’s their effect on global climate change? A comic narrated by polymath Benjamin Franklin describes the evolution of thought on this issue and what we still don’t know.
COMIC: In the US, where political parties have increasingly staked claims on one side of the issue or the other, beliefs may be more about belonging than facts