What is it, she asks me, why do people cry? Why do we cry when we're happy and when we're sad or hurt? I tell her what I know or think I know: that the body does not distinguish between emotional and physical pain; the muscles around the lachrymal glands receive a message from the brain, then tighten and squeeze out tears. Tears contain high levels of the hormone ACTH and prolactin, endorphins (which we know are mood-altering and pain-killing), as well as thirty times more manganese than is found in blood, suggesting that human tears can concentrate and remove harmful substances from the body. Prolactin in humans controls fluid balance; by the age of eighteen women have 60 percent more prolactin than men, which may explain why women seem to cry more often. I tell her that sadness--like happiness--is an intense feeling of being alive, of having essence. I try to explain to her my own nonscientific theory: that crying is about weight or heft, that we cry when our bodies feel too light or too heavy to bear or hold on to language.

It is difficult to overstate the importance of understanding mirror neurons and their function. They may well be central to social learning, imitation, and the cultural transmission of skills and attitudes—perhaps even of the pressed-together sound clusters we call words. By hyperdeveloping the mirror-neuron system, evolution in effect turned culture into the new genome. Armed with culture, humans could adapt to hostile new environments and figure out how to exploit formerly inaccessible or poisonous food sources in just one or two generations—instead of the hundreds or thousands of generations such adaptations would have taken to accomplish through genetic evolution.Thus culture became a significant new source of evolutionary pressure, which helped select brains that had even better mirror-neuron systems and the imitative learning associated with them. The result was one of the many self-amplifying snowball effects that culminated in Homo sapiens, the ape that looked into its own mind and saw the whole cosmos reflected inside.

Music can be appreciated from several points of view: the listener, the performer, the composer. In mathematics there is nothing analogous to the listener; and even if there were, it would be the composer, rather than the performer, that would interest him. It is the creation of new mathematics, rather than its mundane practice, that is interesting. Mathematics is not about symbols and calculations. These are just tools of the tradequavers and crotchets and five-finger exercises. Mathematics is about ideas. In particular it is about the way that different ideas relate to each other. If certain information is known, what else must necessarily follow? The aim of mathematics is to understand such questions by stripping away the inessentials and penetrating to the core of the problem. It is not just a question of getting the right answer; more a matter of understanding why an answer is possible at all, and why it takes the form that it does. Good mathematics has an air of economy and an element of surprise. But, above all, it has significance.

How thoroughly the chimps and bonobos have erased the list of purported human distinctions!-self-awareness, language, ideas and their association, reason, trade, play, choice, courage, love and altruism, laughter, concealed ovulation, kissing, face-to-face sex, female orgasm, division of labor, cannibalism, art, music, politics, and featherless bipedalism, besides tool using, tool making, and much else. Philosophers and scientists confidently offer up traits said to be uniquely human, and the apes casually knock them down--toppling the pretension that humans constitute some sort of biological aristocracy among the beings of Earth. Instead, we are more like the nouveau riche, incompletely accommodated to our recent exalted state, insecure about who we are, and trying to put as much distance as possible between us and our humble origins. It's as if our nearest relatives, by their very existence, refute all our explanations and justifications. So as counterweights to human arrogance and pride, it is good for us that there are still apes on Earth.

The Himalayas are the crowning achievement of the Indo-Australian plate. India in the Oligocene crashed head on into Tibet, hit so hard that it not only folded and buckled the plate boundaries but also plowed into the newly created Tibetan plateau and drove the Himalayas five and a half miles into the sky. The mountains are in some trouble. India has not stopped pushing them, and they are still going up. Their height and volume are already so great they are beginning to melt in their own self-generated radioactive heat. When the climbers in 1953 planted their flags on the highest mountain, they set them in snow over the skeletons of creatures that had lived in a warm clear ocean that India, moving north, blanked out. Possibly as much as 20,000 feet below the sea floor, the skeletal remains had turned into rock. This one fact is a treatise in itself on the movements of the surface of the earth. If by some fiat, I had to restrict all this writing to one sentence; this is the one I would choose: the summit of Mount Everest is marine limestone.

It seems that scientific research reaches deeper and deeper. But it also seems that more and more people, at least scientists, are beginning to realize that the spiritual factor is important. I say 'spiritual' without meaning any particular religion or faith, just simple warmhearted compassion, human affection, and gentleness. It is as if such warmhearted people are a bit more humble, a little bit more content. I consider spiritual values primary, and religion secondary. As I see it, the various religions strengthen these basic human qualities. As a practitioner of Buddhism, my practice of compassion and my practice of Buddhism are actually one and the same. But the practice of compassion does not require religious devotion or religious faith; it can be independent from the practice of religion. Therefore, the ultimate source of happiness for human society very much depends on the human spirit, on spiritual values. If we do not combine science and these basic human values, then scientific knowledge may sometimes create troubles, even disaster....

Modern scientific culture has evolved from its roots in the ancient world and has become a complex web of many highly specialized disciplines. Gone are the days when one man, such as the seventeeth-century Robert Hooke, could be a groundbreaking inventor, microscopist, physicist, surveyor, astronomer, biologist and even artist. Today the sheer enormity of available information has led to highly defined specialisms, and academics are expected to keep to their field - despite the truism that science has no experts. [...] The gains from modern science are beyond counting. But the loss, arguably, is the synthesis of information generated by the many gentleman scholars that once existed, before becoming extinct somewhere around hte late nineteenth century. So few scholars now have a chance to view the bigger picture - to seek out patterns that might unexpectedly exist when apparently unrelated data is brought together. It has to be remembered that the difference between a major breakthrough and nothing at all can be just the angle of view rather than anything else.

It is hypocritical to exhort the Brazilians to conserve their rainforest after we have already destroyed the grassland ecosystem that occupied half the continent when we found it. A large-scale grassland restoration project would give us some moral authority when we seek conservation abroad. I must admit that I also like the idea because it would mean a better home for pronghorn, currently pushed by agriculture into marginal habitats-The high sagebrush deserts of the West. I would love to return the speedsters to their evolutionary home, the Floor of the Sky. Imagine a huge national reserve where anyone could see what caused Lewis and Clark to write with such enthusiasm in their journals-the sea of grass and flowers dotted with massive herds of bison, accompanied by the dainty speedsters and by great herds of elk. Grizzly bears and wolves would patrol the margins of the herds and coyotes would at last be reduced to their proper place. The song of the meadowlarks would pervade the prairie and near water the spring air would ring with the eerie tremolos of snipe.

Current theories on the creation of the Universe state that, if it were created at all and didn't just start, as it were, unofficially, it came to being between ten and twenty thousand million years ago. By the same token the earth itself is generally supposed to be about four and a half thousand million years old.These dates are incorrect.Medieval Jewish scholars put the date of the Creation at 3760BC. Greek Orthodox theologians put Creation as far back as 5508BC.These suggestions are also incorrect.Archbishop James Usher (1580-1656) published Annales Veteris et Novi Testamenti in 1654, which suggested that the Heaven and the Earth were created in 4004BC. One of his aides took the calculation further, and was able to announce triumphantly that the Earth was created on Sunday the 21st of October, 4004BC, at exactly 9.00 a.m., because God liked to get work done early in the morning while he was feeling fresh.This too was incorrect. By almost a quarter of an hour.The whole business with the fossilized dinosaur skeletons was a joke the paleontologists haven't seen yet.

The investigation described in the subsequent pages bears close relation to three sciences. It was approached by the author from the standpoint of astronomy and a desire to understand the variations of the sun. It was hoped that these variations could be more accurately studied by correlation with climatic phenomena. But the science of meteorology is still comparatively new and supplies us only with a few decades of records on which to base our conclusions. So botanical aid was sought in order to extend our knowledge of weather changes over hundreds and even thousands of years by making use of the dependence of the annual rings of trees in dry climates on the annual rainfall. If the relationship sought proves to be real, the rings in the trunks of trees give us not only a means of studying climatic changes through long periods of years, but perhaps also of tracing changes in solar activity during the same time. Thus astronomy, meteorology, and botany join in a study to which each contributes essential parts and from which, it is hoped, each may gain a small measure of benefit.

Some 3.6 million years ago, in what is now northern Tanzania, a volcano erupted, the resulting cloud of ash covering the surrounding savannahs. In 1979, the paleoanthropologist Mary Leakey found in that ash footprints - the footprints, she believes, of an early hominid, perhaps an ancestor of all the people on the Earth today. And 380,000 kilometers away, in a flat dry plain that humans have in a moment of optimism called the Sea of Tranquility, there is another footprint, left by the first human to walk another world. We have come far in 3.6 million years, and in 4.6 billion and in 15 billion.For we are the local embodiment of a Cosmos grown to self-awareness. We have begun to contemplate our origins: starstuff pondering the stars; organized assemblages of ten billion billion billion atoms considering the evolution of atoms; tracing the long journey by which, here at least, consciousness arose. Our loyalties are to the species and the planet. We speak for Earth. Our obligation to survive is owed not just to ourselves but also to that Cosmos, ancient and vast, from which we spring.

From the study of the development of human intelligence, in all directions, and through all times, the discovery arises of a great fundamental law, to which it is necessarily subject, and which has a solid foundation of proof, both in the facts of our organization and in our historical experience. The law is this: that each of our leading conceptions -- each branch of our knowledge -- passes successively through three different theoretical conditions: the theological, or fictitious; the metaphysical, or abstract; and the scientific, or positive. In other words, the human mind, by its nature, employs in its progress three methods of philosophizing, the character of which is essentially different, and even radically opposed: namely, the theological method, the metaphysical, and the positive. Hence arise three philosophies, or general systems of conceptions on the aggregate of phenomena, each of which excludes the others. The first is the necessary point of departure of the human understanding, and the third is its fixed and definitive state. The second is merely a state of transition.

I am sitting under a sycamore by Tinker Creek. I am really here, alive on the intricate earth under trees. But under me, directly under the weight of my body on the grass, are other creatures, just as real, for whom also this moment, this tree, is “it”… in the top inch of soil, biologists found “an average of 1,356 living creatures in each square foot… I might as well include these creatures in this moment, as best as I can. My ignoring them won’t strip them of their reality, and admitting them, one by one, into my consciousness might heighten mine, might add their dim awareness to my human consciousness, such as it is, and set up a buzz, a vibration…Hasidism has a tradition that one of man’s purposes is to assist God in the work of “hallowing” the things of Creation. By a tremendous heave of the spirit, the devout man frees the divine sparks trapped in the mute things of time; he uplifts the forms and moments of creation, bearing them aloft into the rare air and hallowing fire in which all clays must shatter and burst.

يا طير هجت الطائرينا ... و فتنت لب العالمينالله درك ساحرا ... أبطلت كيد الساحريناأظهرت معجزة العلوم... لنا و كنا كافريناإنا لقوم يعشقون... النابغين الباسلينايتسابقون حفاوة ... بالأقربين الأكرمينا

During the Society's early years, no member personified the organization's eccentricities or audacious mission more than Sir Francis Galton. A cousin of Charles Darwin's, he had been a child prodigy who, by the age of four, could read and recite Latin. He went on to concoct myriad inventions. They included a ventilating top hat; a machine called a Gumption-Reviver, which periodically wet his head to keep him awake during endless study; underwater goggles; and a rotating-vane steam engine. Suffering from periodic nervous breakdowns––"sprained brain," as he called it––he had a compulsion to measure and count virtually everything. He quantified the sensitivity of animal hearing, using a walking stick that could make an inconspicuous whistle; the efficacy of prayer; the average age of death in each profession (lawyers: 66.51; doctors: 67.04); the exact amount of rope needed to break a criminal's neck while avoiding decapitation; and levels of boredom (at meetings of the Royal Geographical Society he would count the rate of fidgets among each member of the audience).