About 70,000 years ago Scholz's star passed through the Oort Cloud. It may have perturbed some comets from the Oort Cloud. But we won't know for a couple of million years because that's how long it would take for a comet to reach us.
An international team of scientists has extracted a 2.8 kilometers long ice core in Antarctica, hitting the frozen continent’s bedrock. The core represents a chronological register of Earth’s climate and atmosphere
