How do they know it wasn’t made by Homo habilis?
Homo habilis? The Handyman! of course!
thank you, I just learned what a homo habilis was nicknamed, but then I found rudolfensis, which (who?) I’d also never heard of
“While scientists used to think that H. habilis was the ancestor of Homo erectus, recent discoveries in 2000 of a relatively late 1.44 million-year-old Homo habilis (KNM-ER 42703) and a relatively early 1.55 million-year-old H. erectus (KNM-ER 42700) from the same area of northern Kenya (Ileret, Lake Turkana) challenged the conventional view that these species evolved one after the other. Instead, this evidence - along with other fossils - demonstrate that they co-existed in Eastern Africa for almost half a million years.”
https://humanorigins.si.edu/evidence/human-fossils/species/homo-habilis
Originally considered to be H. habilis, the ways in which H. rudolfensis differs is in its larger braincase, longer face, and larger molar and premolar teeth. Due to the last two features, though, some scientists still wonder whether this species might better be considered an Australopithecus, although one with a large brain!... While their teeth were only slightly smaller than those seen in robust australopithecines, H. rudolfensis didn’t have the heavily-built jaw and strong jaw muscle attachments seen in robust early humans....
https://humanorigins.si.edu/evidence/human-fossils/species/homo-rudolfensis