All Things Science Home
       

NASA | Earth Science Week | How is the Global Earth ...

added by teapot
NASA | Earth Science Week | How is the Global Earth ...
  • Write Comments
  • Innappropiate
  • Feature This!
Comments
       

Video Information
From:

teapot

Send PM
(88) | (6) | (0)
Added: 12-02-2009
Runtime: 1m 30s
Views: 4628
Comments: 0

Login to Rate Video

Current Rating:
     
(2 Votes)


Description

Earth is currently in a period of warming. Over the last century, Earth's average temperature rose about 1.1 F (0.6C). In the last two decades, the rate of our world's warming accelerated. Scientists predict that the globe will continue to warm over the course of the 21st century. Is this warming trend a reason for concern? After all, our world has witnessed extreme warm periods before, such as during the time of the dinosaurs. Earth has also seen numerous ice ages on roughly 11,000-year cycles for at least the last million years. So, change is perhaps the only constant in Earth's 4.5-billion-year history. For more info: http://www.nasa.gov/centers/goddard/news/topstory/2008/esw_videos.html


Video URL:



Embed URL