Ultimately we must get a handle on those issues as well, or a creature that outlived the dinosaurs will meet its end at the hands of humans, leaving our descendants to wonder how a creature so ugly could have won so much affection.
结构分析
主干：...we must get a handle or a creature ...will meet its end
1.本句是由or连接的并列句，or表示否则，要不然。
2.前一分句中，get a handle on表示开始理解或了解后一分句中，主语a creature后有一个that引导的定语从句修饰，outlive比......更长寿，现在分词短语leaving作状语，表示谓语meet its end(玩完)所造成的后果。leave...to...中的不定式to wonder作our descendants的补语，wonder后接了一个how引导的宾语从句。
译文：最终我们也一定要解决这个问题，否则这些比恐龙幸存时间还长的生物就将在人类的手上灭绝，到时我们的后代可能会好奇，为什么如此丑陋的生物居然能够获得那么多的关爱。