the mother's heartbeat better there. It's true that the heart is actually in the center, but that's under the breast-bone. The apex of the heart is slightly to the left, where a doctor listens to one's heart with a stethoscope. A baby spends nine months listening to mother's heartbeat, and after birth does seem to relax better when carried on the left.Which came first, right-handedness, ...
the enamel scratches on teeth and, working with living animals, showed that a diet of hard objects such as beetles and bone produced scratches different from those produced by a diet of soft objects.The information thus gained was used to study the fossilized teeth of small animals. It showed that a group of early primates lived primarily on hard insects. This sort of thing is useful in ...
between two bones. In young duckbills where the bones of the skull have not fused, the trigeminal nerve passes between bones. Maclntyre consider this makes the duckbill a reptile. The argument, however, still persists.(C) 1991, Los Angeles Times ...
rockets to his vessel as a joke and set them off. When the rocket impulse died, our hero rubbed himself all over with bone marrow and that carried him the rest of the way. It's a pity that Cyrano didn't have the rockets do the entire job, but you can't have everything.Actually, it was a remarkable bit of intuition on Cyrano's part, since the rocket principle depends on the Third Law of Motion, ...
include a femur (the bone of the upper leg), a tibia and fibula (the two bones of the lower leg), ankle bones and the bones of three toes.That's very small in comparison to the size of the Basilosaurus itself and the legs can't have had much use. They seem to have been permanently flexed and certainly could be of no use on land and of little use in swimming. The legs might have been used to ...
human bones that seem to be those of modern man. If we determine the age of the shells, we will have the age of the bones.We can then estimate when Homo sapiens appeared, and even, perhaps, sharpen our notions as to where we began ...
flare.On top of all this there might be serious consequences of long-term exposure to zero gravity, such as steady bone demineralization and muscle atrophy. We can imagine astronauts arriving on Mars and being barely able to walk.(C)1990, Los Angeles Times ...
suspicion that all human beings and their ancestors originated in Africa.We know of Neanderthals not only by their bones, but by the tools they left behind. Widespread over Europe is the "Mousterian culture" consisting of comparatively simple stone tools. It is so called because the first examples were found in the sands of Moustier in France.There are also tools to be found of the ...
including a hyoid bone just about exactly the shape and size of the ones “modern man” possesses. The age of the bone is estimated at 60,000 years.The implication is that Neanderthal man was anatomically capable of speech. He coexisted with modern man for perhaps as much as 50,000 years, and he could have learned speech from these advanced cousins of his.I must admit that I have a personal ...
that the fossil is of a bird that is capable of flying.What's more, at the end of its vertebral column there is a bone called a 'pygostyle," which modern birds have at the base of their tail. This means that the fossil had a bird-tail instead of a lizard-tail. A bird-tail has feathers that act as a brake on flight when the bird is landing-again evidence that the fossil could fly.Unfortunately ...