'Screw ' was found in a stone by UFO researchers in Russia , Kaluga region . The unusual object is said to be 300 million years old . Some think it 's proof aliens used to live on Earth or a radical civilisation . But it 's more likely to be a fossilised sea creature called a Crinoid .
'Screw ' was found in a stone by UFO researchers in Kaluga region , Russia . The unusual object is said to be 300 million years old . Some think it 's proof aliens used to live on Earth or a radical civilisation . But it 's more likely to be a fossilised sea creature called a Crinoid .