About 66 million years ago, a massive asteroid crashed into Earth near the site of the small town of Chicxulub in what is now Mexico. The impact eradicated roughly 75% of the animal and plant species on Earth, including whole groups like non-avian dinosaurs and ammonites. Fine silicate dust from pulverized rock generated by the impact played a dominant role in global climate cooling and the disruption of photosynthesis following the event, according...
