It's vestigial, meaningit no longer serves its original purpose. There are several other vestigial structures like the plica semilunaris in the human body. Most of these became vestigial long before homo sapiens existed, quietly riding along from one of our ancestor species to the next. What i...
What distinguishes Homo floresiensis from other descendants of Homo erectus? What hominids evolved into Homo erectus? How long have Homo sapiens been upright? How much DNA do Homo sapiens and Neanderthals share? What does Homo erectus mean? What is the difference between Homo erectus and Homo er...
50,000 years - The length of time Homo sapiens has existed as a species 65 million years - The length of time dinosaurs have been extinct 200 million years - The length of time mammals have existed 3.5 to 4 billion years - The length of time that life has existed on Earth 4.5 billion...
50,000 years - The length of time Homo sapiens has existed as a species 65 million years - The length of time dinosaurs have been extinct 200 million years - The length of time mammals have existed 3.5 to 4 billion years - The length of time that life has existed on Earth 4.5 billion...
How long have amphibians existed on Earth? If a dinosaur bone is found between two layers dated at 90 million and 70 million years, respectively, what is the age of the dinosaur bone? How many years ago did amphibians appear? What was the evolution of early and basal vertebrates? The...
Clearly, a great deal of our genetic heritage must have been formed long before Homo sapiens appeared, during the evolution of mammals (which started about 300 million years ago) and even earlier. Because the proteins of mammals as different as whales and humans are very similar, the ...
Homo had to become sapiens before language was possible. Now that we have had some 100,000 years to develop and embellish the idea we see how complex it has become. Unfortunately, sounds do not survive. We have no idea what language was for the first 90 plus thousand years of our ...
For this article, I will only focus on ancient civilizations (civilizations that existed from 3000 BC to 0 AD). My goal is to analyze some well-known civilizations and see how long they lasted. I will divide up the survey by region. I will most certainly miss some major civilizations, ...
The last in this lineage, Homo sapiens or, "wise man," today's humans have spread out much farther than any of our ancestors, modifying our environment and ourselves. In the process, we have ourselves become drivers of environmental change, on a global scale. "In the long view, the li...
How amazing that your associate still quotes the sensational dialogue that apparently, never existed. This missing dialogue that you remember used to include the memorable actress, Lalita Pawar, truly is extraordinary and memorable. I’ve never heard of anything like it, and the fact that you and...