地球の歴史 – Earth History


地球の歴史とコロラド高原を勉強しています。本やウェブサイトを読んで、一人で地球史マップにノートを書き加えていくのは、意外に楽しい。- I started studying the history of the Earth and the Colorado Plateau.  By reading books and websites, I add post-it-notes with my interests to my history map.  The process of this kind of study is surprisingly interesting.

すでに知っている方は多いとは思いますが、その過程で、私にとっての”驚きの事実”が三つありました。- I have found three astonishing facts while doing this. Although it seems they are known to many people, they new and shocking to me.  Here are those three facts:

  1. アメリカ大陸は今でも動いています。過去の話ではなく、毎日、爪が伸びるのと同じスピードでユーラシア大陸から遠ざかっているんです。この事実を前にすると、いつ地震が起きても不思議じゃない。- North America is moving even now.  It’s not a story of the past, it is moving away from Eurasia with the same speed that our nails grow.  I must say that it’s natural to have earthquakes at anytime.
  2. 地球は今、氷河期にあります。え〜!ですよね。詳しくは、間氷期という、氷河期の中でも寒さが温暖な時期ではありますが。- We are in the middle of an Ice age.  Wow!  To be exact, we are in an “Interglacial” period within the ice age.
  3. 地球誕生から、5回も生物が絶滅しています。この事実を踏まえると、人間も含めて今現在のすべての生物はいつか絶滅する時が来ることが予想されます。– We had experienced five mass extinctions since the birth of Earth.  If so, we can easily imagine that we could have another extinction in the future involving many species including our own species of course.

ね、面白いでしょ?- Isn’t it interesting?

もう一つ、ヒトの歴史は138億年前に起こったビッグバンから見るとカゲロウの命より短いんですよ。想像を超えている世界ですよね。でも、そんなふうに思うと、私たちの人生は今しかないような気になってきます。 This is only my realization that our life is much shorter than a Mayfly‘s life based on the Earth’s history since the Big Bang around 13.8 billion years ago.  It’s way beyond my imagination but I start to think that we should enjoy this short moment on Earth.

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