Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
the period of time between around 5.3 million and 1.8 million years ago, in which many modern mammals and the first modern humans appeared:
Share your knowledge with the community
Browse our collection of 300,000+ community-written definitions
