While investigating the remains of a meteorite outside o! Moscow in 1998, Russian scientists discovered a rock with a screw ﬁrmly ﬁxed inside. Geologists estimate the age of the rock to be 300-380 million years old, older than the existence o! dinosaurs. Evidence shows that the iron atams of the screw and the silicon atom ot the rock have in tact spread and fused, suggesting the screw is by no means a recent addition to the rock.