Hellow guys, Welcome to my website, and you are watching 【一席】宋海軍:生物大滅絕. and this vIdeo is uploaded by 一席YiXi at 2019-10-12T02:41:54-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
Hellow guys, Welcome to my website, and you are watching 【一席】宋海軍:生物大滅絕. and this vIdeo is uploaded by 一席YiXi at 2019-10-12T02:41:54-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
Name | 【一席】宋海軍:生物大滅絕 |
Video Uploader | Video From 一席YiXi |
Upload Date | This Video Uploaded At 12-10-2019 09:41:54 |
Video Discription | 宋海軍,中國地質大學(武漢)教授。 在談大滅絕之前我想先問一個問題,大家知不知道現在地球上有多少種生物?幾萬、幾十萬,還是幾百萬?實際上是150萬。 這個數字聽起來非常多,但其實只佔地球曾經擁有的物種很少的一部分,只佔1%。也就是說我們地球上曾經居住著一億五千萬種生物,它們99%都滅絕了。 我們當前也面臨著一個類似的情況。大家可能都知道,當前地表正在升溫,碳排放正在加劇,所以就有科學家提出,現在會不會再有一次生物滅絕事件,也就是說會不會有第六次生物大滅絕。 |
Category | Education |
Tags | Education Download MP4 | Education Download MP3 | Education Download MP4 360p | Education Download MP4 480p | Education Download MP4 720p | Education Download MP4 1080p |