Scientists have been scrambling to devise better warning systems and defenses after a 7.5 magnitude earthquake struck the Indonesian island of Sulawesi and killed thousands. Earthquakes are the main source of tsunamis, but global warming may cause even more in the future.

Scientists have been scrambling to devise better warning systems and defenses after a 7.5 magnitude earthquake struck the Indonesian island of Sulawesi and killed thousands. Earthquakes are the main source of tsunamis, but global warming may cause even more in the future.