Two scientists explored the idea that there was another civilizaton before humans, which harnessed energy and wiped itself out. To investigate, they looked deep into the Earth’s past but also far into its future
When astrobiologist Adam Frank walked into the office of NASA scientist Gavin Schmidt, he had what he believed was the weirdest question: do aliens experience climate change? It took just moments for Schmidt to out-weird him.
Frank, a University of R... [6937 chars]