66 Million Years Ago: The Day the Dinosaurs Died in Fire, Acid, and Rot

An asteroid 10 kilometers wide slammed into what is now Mexico 66 million years ago, turning the planet into a hellscape of acid rain, supersonic winds, and a stench like rotting vegetables. The Chicxulub impact did not merely end the age of dinosaurs; it triggered a global catastrophe that collapsed temperatures, wiped out more than half of all living species, and cleared the path for mammals to dominate the Earth.

Professor Michael Benton of the University of Bristol and Professor Monika Grady of the Open University have reconstructed a full sensory account of the event. Their work details the sights, sounds, and smells that any hypothetical survivor would have experienced, painting a picture of successive nightmares.

The Day Before the Strike

Temperatures at the impact site were a warm 26 degrees Celsius. The asteroid became visible in the sky even during daylight, resembling a star that grew brighter and faster with each passing hour. A blinding flash of light, intense enough to cause immediate blindness, erupted and was followed instantly by a deafening sonic boom that shook the ground. Everything near the impact site vaporized in an instant.

The asteroid was so enormous that it struck the Earth before any creature could flee. Even animals located 2,000 kilometers away died instantly from the searing heat and winds that traveled faster than the speed of sound. Category-five hurricane-force winds flattened everything within a 1,500-kilometer radius. Temperatures soared to 227 degrees Celsius, and the air filled with scalding steam.

Immediately afterward, colossal tsunami waves reaching 100 meters in height battered the shores of what is now the Gulf of Mexico. Those who survived the initial blast at a distance of 3,000 kilometers did not live long. They were killed by earthquakes, incinerated in firestorms, or crushed by molten rock raining from the sky.

The End of the First Week

Everything had turned upside down. The planet entered a deep freeze, with temperatures dropping by 5 degrees Celsius. Most dinosaurs, along with large flying reptiles and swimming reptiles, died from the extreme cold within this first week alone. Storms of burning acid rain began to fall, and the stench of rotting vegetables, dead animals, and suffocating smoke filled the entire world, creating an unbearable and nauseating odor.

The sun remained absent. Temperatures fell to 15 degrees Celsius below pre-disaster levels. Everywhere, the massive skeletons of giant creatures lay scattered across the landscape. Only the smallest creatures survived: mammals the size of rats and insects that hid in rock crevices.

66 Million Years Later

The Earth remained trapped in a harsh, violent winter. Rivers and lakes were completely frozen. There were no humans, of course, and no larger mammals. Only organisms that could burrow underground or live underwater managed to survive.

The world eventually recovered. The asteroid that killed half of all life on Earth opened the door for mammals to grow and spread. The experts warn that modern humans are now causing changes to the atmosphere that closely resemble the changes that killed the dinosaurs. If current trends continue, they caution, humanity may one day face the same fate.