What's kt-event in science 1-2 sentences.

KT-event, also known as the Cretaceous-Tertiary event, refers to a mass extinction event that occurred approximately 66 million years ago, resulting in the extinction of the dinosaurs and many other species, and marking the end of the Mesozoic Era.

KT-event, also known as the K-T boundary, refers to a geological event that occurred approximately 66 million years ago when a massive asteroid impact led to the extinction of the dinosaurs and many other forms of life on Earth.

The term "kt-event" refers to a unit of energy released during large-scale geologic events, such as asteroid impacts or volcanic eruptions. The "kt" stands for "kilotons," where one kiloton is equivalent to the detonation of 1,000 tons of TNT.