Ck 12: Episd: Human Actions and the Sixth Mass Extinction

99 percent of the species that have ever lived on this planet are extinct. The best way to understand when another extinction could happen is to study the previous five mass extinctions. The video discusses each one, the cause, the...

Did you know that 98 percent of organisms that ever lived are now extinct? PBS Digital Studios presents viewers with information about previous extinctions, their causes, and related statistics such as what percent of organisms went...

[Free Registration/Login may be required to access all resource tools.] Describes how human actions are resulting in a sixth mass extinction.

[Free Registration/Login may be required to access all resource tools.] Describes how human actions are resulting in a sixth mass extinction.

Normal background extinctions and mass extinction events are examined in this short video that suggests that environmental change, naturally occurring and change caused by humans, is the key factor in such events.

Extinctions constantly occur, but what sets off a mass extinction event? Young scientists study the data from the previous five mass extinctions to better understand their causes. Then, they learn the impact each extinction had on our...

Are we, as some scientists theorize, in the midst of the sixth mass extinction? Scholars explore speciation through adaptive radiation and extinction with a video that uses the three-spines stickleback in Alaska, and its current...

[Free Registration/Login may be required to access all resource tools.] Recognize the structure and function of the human skeleton.

[Free Registration/Login may be required to access all resource tools.] Identify and describe the primary types of human muscle tissue.

[Free Registration/Login may be required to access all resource tools.] Recognize the social and ethical issues which arise when working in the field of biotechnology.