Will human existence define an epoch? Many scientists think we are in a new epoch, the anthropocene, defined by humans and our impact on the environment. An online interactive demonstrates the immense impact humans have had on every part...

If any of the limiting factors in an environment change, both animal and plant populations also change. The video explains two different models of growth and the impact of limiting factors. It highlights the carrying capacity of an...

Can microorganisms live in the dry, cold climate of Antarctica? Young scientists view a research project measuring microorganisms in the Taylor Glacier. They record the findings from dirty ice, clean ice, boots, sediment, and more. Then...