Scientists are using the site to help determine the frequency of catastrophes like the event of 26 December 2004. This is being done by dating the cave's tsunami-borne sediments, which are easy to see between layers of bat droppings. Continue reading the main story “ Start Quote Because people thought they had no history of such things, they thought it was impossible” End Quote Prof Kerry Sieh Director, Earth Observatory of Singapore "The tsunami sands just jump right out at you because they're separated by guano layers. There's no confusing the stratigraphy (layering)," explains Dr Jessica Pilarczyk. "It makes for...