Small "toy" breeds, as per new research, often have doubled-up teeth similar to sharks' mouths. New research published in the journal 'Research in Veterinary Science' shows that seven per cent of pet dogs, mostly smaller breeds, exhibit the condition known as persistent deciduous teeth.

New research suggests your Chihuahua or other toy breed dog may have 'shark teeth'.  Here's what it means

Ancient shark teeth, bones of woolly rhinoceros, mammoths and other extinct animals - those are rare artifacts which attract Russian palaeontologists to the ice-covered Tobol river some 2,000 kilometres east of Moscow.

Russia: Divers hunt for ancient bones in frozen river

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