These days the term 'species' is thrown around as if it were a definite unit, but the realities of defining a species are much trickier, and more contentious, than they seem. Biologists have argued over the definition of a species since the dawn of humanity, but have yet to come up with a single species concept that works for all types of life. This film explores current concepts used across the various fields of biology and covers some of the specific problems they encounter.
With "My Queue" you can quickly save videos to watch later.
To add an item to your queue just click the sign next to the video.
Once you've added a video visit "My Queue" to start watching!