41–53 of 53
Knowing what we know from X-ray and related studies of the fibrous proteins, how they are built from long polypeptide chains with linear patterns drawn to a grand scale, how these chains can contract and take up different configurations by intramolecular folding, how the chain- groups are penetrated by, and their…
We may indeed live yet to see, or at least we may feel some confidence that those who come after us will see, such bodies as oxygen and hydrogen in the liquid, perhaps even in the solid state, and the question of their metallic or non-metallic nature thereby finally settled.
Nor ever yet The melting rainbow's vernal-tinctur'd hues To me have shone so pleasing, as when first the hand of science pointed out the path In which the sun-beams gleaming from the west Fall on the watery cloud.
The doctrine of those who have denied that certainty could be attained at all has some agreement with my way of proceeding at the first setting out; but they end in being infinitely separated and opposed. For the holders of that doctrine assert simply that nothing can be known. I also assert that not much can be known…
No law of physics is more basic than the law of entropy, the tendency of the universe to move toward disorder and death. But life bucks the tide. using available free energy wherever it can get it, and hereabouts the most abundant source of energy is sunlight. The mayflower constructs its tiny oasis of order by…
anything labeled with the recycling code three, six, or seven goes into the trash. (In my research on BPA, I encountered a mnemonic device with the lilt of a nursery rhyme: “Four, five, one, and two/All the rest are bad for you.”)
In fact, an early clue to the potential risks posed by plastic was discovered entirely by accident. In August of 1998, Washington State University geneticist Patricia Hunt found herself baffled by an unexpected development in her lab. Hunt was using experiments on lab mice to explore why the eggs of older women are…
But the reflected light-waves do more for us than this. They not only make us see things, but they make us see them in different colours. What, you will ask, is this too the work of the sunbeams? Certainly; for if the colour we see depends on the size of the waves which come back to us, then we must see things…
We can expect bodies to be well equipped to survive, but this does not mean they should be perfect with respect to any one dimension. An antelope might run faster, and be more likely to escape a leopard, if its legs were a little longer. But a rival antelope with longer legs, although it might be better equipped to…
Declaration of Independence puts it - 'the laws of nature and of nature's GOD'. Dr Benjamin Franklin was revered in Europe and America as the founder of the new field of electrical physics. At the Constitutional Convention of 1789 John Adams repeatedly appealed to the analogy of mechanical balance in machines; others…
Ramelli's designs were very inventive and often required precise machining that was impossible in his day. Many were successfully manufactured and sold, two or three centuries later. Ramelli designed the "book-wheel" or “reading wheel” to present volumes of text to readers in whatever position they had last placed…
At the end of the last century Boltzman made an elegant redefinition of entropy as a measure of the probability of a molecular distribution. It may seem at first obscure, but it leads directly to what we seek. It implies that the probably life or one of its products, and if we find such a distribution to be global in…
For the sediments are the materials of the most stupendous 'snowfall' the earth has ever seen. It began when the first rains fell on the barren rocks and set in motion the forces of erosion. It was accelerated when living creatures developed in the suface waters and the discarded little shells of lime or silica that…