28:56
Physical Geography: Making Sense of Planet Earth - Human Impacts on the Natural Environment
About this title: Human beings have become a geographical force. In the 21st century human beings each year bring more change to the surface of the planet than all the natural forces combined. In this final program Alec Murphy presents an intriguing...
22:38
Our planet earth
If Earth's entire history could be compressed into a single year, modern humans would've appeared just 23 minutes ago! Use this video to introduce your students to the concept of geological time (also called deep time); relative age dating of rock v...