Last week's Fossil Friday was apparently a tough one. Only 4 guesses—and half of them were for sloths! The correct answer was quickly supplied by Joshua Vallejos.
Says anthropologist Eric Meikle:
"The fossil is usually referred to either Homo ergaster or Homo erectus, depending on one’s views about early species within the genus Homo.
This specimen is known as KNM-WT 15000. It was found in 1984 along with many other associated bones of a partial skeleton at the site of Nariokotome, west of Lake Turkana in northern Kenya. This site is about 1.6 million years old."
Congrats to Joshua. You get the bragging rights for the week!