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K-Ar dating
shorthand for potassium-argon dating.
acronym for "thousand years ago."
Kay's threshold
the upper most weight limit for insectivorous primates and the lowest weight limit of folivorous primates; approximately 500 grams.
Kenyanthropus platyops

"Flat Face Man"; an extinct African hominin, a possible Pliocene ancestor to humans, that approximately dates from 3.5 to 3.3 million years ago, making it contemporaneous with Australopithecus; fossil remains found at Lomekwi in Kenya include a relatively complete, but crushed, cranium and a few preserved teeth; Kenyanthropus platyops has a relatively small brain, small molars, and a relatively flattened face. The type specimen for K. platyops is KNM-WT-40000 found at Lomekwi.

the process of striking a tool, such as flint or stone.
a person who knaps.
a type of quadrupedal movement used by apes where the upper body is supported by bent knuckles.