Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

The number of hares in a forest is a good indicator of how healthy that ecosystem is -- and now there's a better way to find out. A new study shows recently developed camera-trapping methods could be ...

Radiocarbon dating, or carbon-14 dating, is a scientific method that can accurately determine the age of organic materials as old as approximately 60,000 years. First developed in the late 1940s at ...