Background[ edit ] The term "echolocation" was coined by zoologist Donald Griffin in ; however, reports of blind humans being able to locate silent objects date back to
Choi, Live Science Contributor November 11, This is Part 8 in a part LiveScience series on the origin, evolution and future of the human species and the mysteries that remain to be solved.
The way humans make and use tools is perhaps what sets our species apart more than anything else. Now scientists are more and more uncovering the forces that drove our lineage to our heights of tool use — and how tool use, in turn, might have influenced our evolution.
The first stone tools — the Oldowan The ability to make and use tools dates back millions of years in our family tree. Chimpanzees, our closest living relatives, can on their own devise spear-like weapons for hunting and create specialized tool kits for foraging antssuggesting our family tree may have possessed wooden tools since the ancestors of humans and chimps diverged some 4 million years ago.
The dawn of stone tools dates back some 2. Known as the Oldowan, these include not just fist-sized hunks of rock for pounding, but also the first known manufacture of stone tools — sharp flakes created by knapping, or striking a hard stone against quartz, obsidian, flint or any other rock whose flakes can hold an edge.
At this time are also the oldest known butchered animal bones. This was the extent of the technology for nearly a million years. Such technology is just slightly past the range of what apes generally do, Wynn added. Indeed, chimpanzees in the wild can use stones as simple tools for hammering, and the chimpanzee-like bonobo ape can even be taught how to flake stone to make cutting tools.
The appearance of stone tools falls roughly in the middle of a drying trend in Africa between 2 million and 3 million years ago that would have presented our distant ancestors with a greater variety of habitats than they would have known before, such as woodlands to grasslands, explained paleoanthropologist Thomas Plummer at Queens College in New York.
A great advance in technology — the Acheulean Jump ahead to roughly 1. This is the beginning of what we call the Acheulean. I would place all this as an even more significant transition than the initial use of stone tools. It just shows an increased interest in meat.
Scientists argue, for instance, when provisioning or the sharing of food began. So the suggestion is that provisioning helps females find something to eat.
One is that males are the ones bringing food over due to pair-bonding between the sexes.
Another is the "grandmother hypothesis," where grandmothers bring their daughters food to help them raise their offspring.
Still, Wynn noted other research has suggested primates spread throughout the Old World do possess these female links, "and Homo erectus has a very different distribution from the African apes, were distributed more widely in Africa and Asia, and so maybe Homo erectus mimics the behavior of these other primates.
Also, the new fossil Ardipithecus tells us our ancestors may not have been very much like chimps and gorillas, so maybe socially we were not as alike as well.
Chimpanzees are terrible at that — they see a task and have to reinvent the wheel. This gets back to mirror neurons and the copying of behavior.
What we need are more creative ideas on how to extract understanding from them, and what they tell us about our evolution.Humans must remain in the care of their parents for much longer than other living primates.
The question then becomes why, when it might make more evolutionary sense to grow as fast as possible to. The ability to make and use tools dates back millions of years in our family tree. can on their own devise spear-like weapons for hunting . Well, while humans, as a species, are pretty smart, it’s impossible for us to claim the title of “most intelligent” species.
After all, we still have many questions left to answer about our.
Humans' ability of speech is unique among primates. Humans are able to create new and complex ideas, They are named according to their degree of difference between humans and their nearest animal relative (chimpanzees) (HAR1 showing the largest degree of human-chimpanzee differences). Because stone tools are less susceptible to destruction than bones, stone artifacts typically offer the best evidence of where and when early humans lived, their geographic dispersal, and their ability to survive in a variety of habitats.
It's the ability to make a psychic and emotional connection with another person, to actually enter into their mind-space. When we experience real empathy or compassion, in .