About 55 million years ago, there was a really abrupt warming event, and what happened was a whole bunch of carbon dioxide was released into earth's atmosphere, and it caused a rapid and pretty extreme global warming event.
Hace unos 55 millones de años, hubo un calentamiento abrupto, y se liberó muchísimo dióxido de carbono a la atmósfera terrestre. Eso produjo rápidamente un calentamiento global extremo.