評論
打印
The objection was based on one simple observation, earth has been hit many times...
這種異議基于一個簡單的發現，地球已經遭受過多次碰撞，
and these impacts, even the really big ones, seldom coincide with mass extinctions.
而這種碰撞，哪怕是最大的碰撞，都很少與物種大滅絕相關聯。
For the very large craters that we think might have produced global effects,
我們通常認為那些巨大的隕石坑會造成全球性的影響，
in some cases they don't line up with any extinction events whatsoever
但是一方面它們沒有關系到任何一次滅絕事件，
and in other cases extinction events, very well dated extinction events
另一方面，就清楚記載的滅絕事件而言，
have occurred that are not associated with any impacts.
它們的發生都與碰撞無關。
Because of this, some scientists had long doubted that any impact could have wiped out the dinosaurs
基于這個原因，一些科學家一直都在懷疑究竟是不是大碰撞導致了恐龍消失，
and now there is new evidence which seems to reinforce those suspicions.
現在他們的疑慮有了新的證據作為支撐。
The new evidence relates to the forest fires that were said to have raged all over the world.
這些新的證據，與據說肆虐了整個世界的森林大火有關。
They seem to have been supported by soot in the KT boundary layers,
支持該理論的證據是存在于第三紀界線層中的煙灰，
but the problem with soot is that it can be blown thousands of miles from where the burning actually happened,
但是煙灰有可能是從實際發生火災的數千英里之外被吹到這里來的，
so one researcher decided to investigate a more reliable kind of evidence... charcoal!
所以一位研究人員決定著手調查一種更為可靠的證據：木炭！
