An Impact Event
A meteor that was about seven miles wide struck the world about 66 million years ago. It was moving at a speed of about 67,000 mph. As a result, over 75% of all life on the earth perished. The Earth was no longer home to dinosaurs. The Earth had an 18-month long winter. Even yet, it wasn't the largest meteor to ever strike the earth.
The truth is that meteors frequently strike the Earth. Many others narrowly miss us. It's very difficult to determine the likelihood of another meteor striking us with the same force as the one that struck Earth 66 million years ago since meteor strikes are so unpredictable. Many of them are missed by us until they are almost about to miss us.
Scientists are working to develop early warning systems that could, at the very least, give people enough time to leave, stop disasters like the Tunguska explosion of 1908 from being as destructive. However, no amount of preparedness will ever make a difference if one the size of the meteor that killed out the dinosaurs shows up.
