
Giant tsunamis, super volcanoes and earthquakes could pose a greater threat than terrorism, scientists claim.
Global Geophysical Events, or "Gee Gee's", as they are nick-named, are not being taken seriously enough, they say.
The global community needs to monitor these risks, and develop strategies to cope in the face of a catastrophe.
However, we are making good progress in reducing the threat of asteroid impacts, the researchers said during a briefing at the Royal Institution, UK.
The BBC website has further information.