Sciences et technologies, Archéologie, Dinosaures
Audio avec voix humaine
A geologist recalls the first scientific proposals of the theory that a large asteroid or comet had collided with Earth sixty-five million years ago, causing the extinction of the dinosaurs. Describes the vehement debate that followed, the accumulation of evidence,… and the discovery of a crater beneath the Yucatan peninsula that appears to substantiate the impact claim. c1997.