'Traces of iridium in rocks lend credence to the theory that this cosmic event led to the dinosaurs' extinction'
asteroid/meteorite hitting the Earth
IRIDIUM: Traces of iridium in rocks lend credence to the theory that this cosmic event led to the dinosaurs' extinction
Traces of iridium in rocks lend credence to the theory that this cosmic event led to the dinosaurs' extinction
Traces of iridium in rocks lend credence to the theory that this cosmic event led to the dinosaurs' extinction
IRIDIUM
asteroid/meteorite hitting the Earth
IRIDIUM