恐竜は約6500万年前に絶滅しました。大規模な小惑星の衝撃が絶滅イベントの主な原因であり、それが大規模な火災としばらくの間太陽を遮る「核冬」効果を引き起こしたことを示唆する証拠があります。これは、地球の気候と生態系に大きな影響を与え、恐竜を含む多くの種の広範な死と絶滅を引き起こしたでしょう。

火山活動や海面の変化などの他の要因も、恐竜の絶滅に寄与している可能性があります。継続的な研究と議論にもかかわらず、恐竜の絶滅の正確な原因は科学的調査と憶測の主題であり続けています。
The dinosaurs went extinct approximately 65 million years ago. There is evidence to suggest that a large asteroid impact was the primary cause of the extinction event, which caused massive fires and a "nuclear winter" effect that blocked out the sun for a period of time. This would have had a profound effect on the Earth's climate and ecosystem, and caused widespread death and extinction of many species, including the dinosaurs.

Other factors, such as volcanic activity and changes in sea level, may have also contributed to the extinction of the dinosaurs. Despite ongoing research and debate, the exact causes of the dinosaurs' extinction remain the subject of scientific investigation and speculation.