<human>:  Where did the extinction occur in the K-T extinction event?
<bot>: The K-T extinction occurred 65 million years ago, and it was caused by a massive asteroid impact. The asteroid hit Earth and caused a global extinction event. The asteroid was about 10 kilometers wide, and it caused a huge amount of damage. The asteroid hit the Earth at a speed of about 30 kilometers per second, and it caused a huge amount of damage.