Australian researchers discovered 750 shark teeth deep in the Indian Ocean.
A graveyard studded with thousands of shark teeth is lurking nearly 3.5 miles beneath the surface of the Indian Ocean.
"It was our very last sample of the trip before heading back to Australia," Dianne Bray , senior collections manager at the Museums Victoria Research Institute, told Live Science."I was a little disappointed at first when we hauled up the net because it was filled with mud and I knew that there wasn't going to be many fish specimens. And even if there were, they would be rumbled and damaged from all the mud.
"We tipped the contents out on the deck of the boat and as we went through everything, we found shark tooth after shark tooth," Bray said."We were finding teeth from [modern] mako and [great] white sharks, but also fossilized teeth from ancient sharks like the immediate ancestor of the giant megalodon shark." In total, researchers collected more than 750 teeth ranging in size from 0.39 inch to a single tooth from the megalodon ancestor measuring 4 inches .
"It's quite remarkable," Bray said."The teeth weren't weathered, rumbled or tumbled. Bacteria consumed all of the organic matter from the teeth and the roots were gone, but otherwise the enamel was left."
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