Well, paleontologists for the last 200 years have been charting death. It's strange -- extinction as a concept wasn't even thought about until Baron Cuvier in France found this first mastodon.
在过去的200年里，古生物学家 都一直密切观察并记录死亡情况。 直到法国的Baron Cuvier发现第一只乳齿象 作为概念，灭绝才开始引起人们的思考。