Examlex
If two vectors are perpendicular to each other, their cross product must be zero.
Fossil Record
The total number of fossils discovered and the information they provide about past life forms and the environments they lived in.
Mousterian Tools
A set of stone tool types associated with Neanderthals and early modern humans, characterized by their flake-based technology.
Flake Tools
Prehistoric stone tools created by chipping or flaking off pieces from a larger stone, used by early humans for cutting and scraping.
Homo Erectus
An extinct species of early human that lived throughout Africa, Asia, and Europe between approximately 1.9 million and 143,000 years ago, known for its upright posture.
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