Measles and TB evolved from diseases of our cattle, influenza from a disease of pigs, and smallpox possibly from a disease of camels. The Americas had very few native domesticated animal species from which humans could acquire such diseases.

We do a lot of bird-watching up in the country, but we almost never have a chance to people-watch. There simply aren't enough human beings up here: there is nowhere you can park yourself with a cup of coffee and observe the species on parade.

We can do genetics. We can do experiments on fruit flies. We can do experiments on yeast. It's not so easy to do experiments on humans. So, in fact, it helps us, to interpret our own genetic code, to have the genetic code of the other species.

Where we are going as a species is a big question. Human evolution certainly hasn't stopped. Every time individuals produce a new zygote, there's a reshuffling and recombination of genes. And we don't know where all of that is going to take us.

The key to saving the Amazon and the rest of the world's great rainforests is actually very simple: just put a fair price on the role they play in providing a quarter of the world's oxygen, a fifth of fresh water, and 60 percent of its species.

Where do we say that a cell became a blade of grass, which became a starfish, which became a cat, which became a donkey, which became a human being? There's a real lack of evidence from change from actual species to a different type of species.

Shelters, conservationists, those concerned about unnecessary cruelty toward the animals we eat, and people working against species extinction fight to preserve the true riches of our planet, our real inheritance. These are big, critical goals.

I'm working in this very complex set of issues having to do with who we are as a species and how much we can do to the Earth before it starts to buckle under. My work can easily read as an indictment, but I don't see it as that simple a problem.

Every paleontologist knows that most new species, genera, and families, and that nearly all categories above the level of family appear in the record suddenly and are not led up to by known, gradual, completely continuous transitional sequences.

Scientists have always thought that because mammoths roamed such a huge territory - from Western Europe to Central North America - that North American woolly mammoths were a sideshow of no particular significance to the evolution of the species.

It has long been a fact familiar to geologists, that, both on the east and west coasts of the central part of Scotland, there are lines of raised beaches, containing marine shells of the same species as those now inhabiting the neighbouring sea.

The Bahamas has mangrove nurseries, coral reefs, shallow sea grass beds, and deep oceanic trenches - all perfect ecosystems for sharks. Photographing multiple shark species in exquisite water was the assignment I had dreamed about from the start.

We are animals, born from the land with the other species. Since we've been living in cities, we've become more and more stupid, not smarter. What made us survive all these hundreds of thousands of years is our spirituality; the link to our land.

There is a severe horse overpopulation crisis caused by overbreeding in the racing industry. It's time for that industry to accept responsibility for its castoffs and take dramatic action to protect a species that has so loyally served humankind.

In the 1970s, Safari Club International asked the federal government to approve its import of 1,125 not-yet-killed trophies of 40 endangered species, including gorillas, orangutans and tigers, according to the Humane Society of the United States.

We're going to lose more species, acidify the oceans more, do damage that it will take millions of years - if not longer - to unwind. Exactly how much damage will we do? How deep will those scars run? We don't know yet. But we will turn the ship.

I'm trying to make perfect moments. And those generate meaning. If you go deep enough in how to make a moment, very quickly you come to how narrative works - to what we are as a species, how we've come up with telling stories in scenes and images.

Safeguarding our common home is not only essential to protecting endangered species and preserving old-growth forests, it is also paramount to ending poverty, fighting injustice, and protecting the long-term survival of humankind and of our faith.

Global climate change has become entangled with the problem of invasive species. A warmer climate could allow some invaders to spread farther, while causing native organisms to go extinct in their traditional habitats and making room for invaders.

Humans are a social species more than any other, and in order to build a community, which for some reason humans have to do in order to live, we have to solve the communication problem. Language is the tool that was invented to solve that problem.

Lyrically, 'Planets' is the precursor to 'Acid Rain'; it's about a meteoric, intergalactic war that results in an apocalypse and the human species aligning together to go fight something much better than us, our individual trials and tribulations.

The Botanischer Garten in Berlin has one of Europe's finer winter trails, leading in careful order from glasshouses devoted to African-American and Australian desert species, through a fine collection of tropical plants, and on to the orchid house.

By preventing dangerous asteroid strikes, we can save millions of people, or even our entire species. And, as human beings, we can take responsibility for preserving this amazing evolutionary experiment of which we and all life on Earth are a part.

I remember my first lecture on my first day in evolutionary biology, how populations and species change. I sat thinking, 'Why doesn't everyone know this?' I look back on it almost in horror: I came so close to not knowing how exciting our world is.

I think as a species we're not designed to be able to think more than one year into the future - if that. Even trying to imagine one year from now makes most people feel like they've been given a huge boring chunk of homework that's too hard to do.

It's my life's aim to make people understand the job of an actor, what they go through, and why they are such a protected species. People see the glamour part of it. But there's so much stress that often you don't even pay attention to the luxuries.

When you think about it, if the fittest always won, all forests should be completely homogeneous. One species should supplant all others as the most superior competitor. But it doesn't happen that way. Nor does it happen that way in the marketplace.

The egg of every species of animal or plant carries a definite number of bodies called chromosomes. The sperm carries the same number. Consequently, when the sperm unites with the egg, the fertilized egg will contain the double number of chromosomes.

A human being would certainly not grow to be seventy or eighty years old if this longevity had no meaning for the species. The afternoon of human life must also have a significance of its own and cannot be merely a pitiful appendage to life's morning.

Moreover, the concern of some that moving DNA among species would breach customary breeding barriers and have profound effects on natural evolutionary processes has substantially disappeared as the science revealed that such exchanges occur in nature.

What we're most aware of in 'Eight-Legged Freaks' is how similar it is to other movies, a recombinant mutated species itself, the product of the crossbreeding of the suffering-from-gigantism movies of the 1950s and the 1990 B-picture classic 'Tremors.'

Science, already oppressive with its shocking revelations, will perhaps be the ultimate exterminator of our human species - if separate species we be - for its reserve of unguessed horrors could never be borne by mortal brains if loosed upon the world.

Music and dance have also always been a communal activity, something that everyone participated in. The thought of a musical concert in which a class of professionals performed for a quiet audience was virtually unknown throughout our species' history.

I believe we are still so innocent. The species are still so innocent that a person who is apt to be murdered believes that the murderer, just before he puts the final wrench on his throat, will have enough compassion to give him one sweet cup of water.

Dogs who live in each other's company are calm and pragmatic, never showing the desperate need to make known their needs and feelings or to communicate their observations, as some hysterical dogs who know only the company of our species are likely to do.

The human species was not born into a market economy. Bees won't sell you honey if you offer them an electronic funds transfer. The human species imagined money into existence, and it exists - for us, not mice or wasps - because we go on believing in it.

As a species of animal that evolved to make connections and work together, it feels strange to suppress our desire for contact. People enjoy touching each other, and find joy in seeing each other in person - but now we have to keep our physical distance.

Without thinking or reflecting, we plunge into war, contract heavy debts, increase vastly the patronage of the Executive, and indulge in every species of extravagance, without thinking that we expose our liberty to hazard. It is a great and fatal mistake.

One has children in the expectation of dying before them. In fact, you want to make damn sure you die before them, just as you plant a tree or build a house knowing, hoping that it will outlive you. That's how the human species has done as well as it has.

Park women, properly so called, are those degraded creatures, utterly lost to all sense of shame, who wander about the paths most frequented after nightfall in the Parks, and consent to any species of humiliation for the sake of acquiring a few shillings.

When you deal with something like compassion for physical pain, which we know is very, very old in evolution - we can find evidence for it in nonhuman species - the brain processes it at a faster speed. Compassion for mental pain took many seconds longer.

Aside from bringing back extinct species, reanimation could help living ones by restoring lost genetic diversity. The Tasmanian devil (aka Sarcophilus harrisii) is so inbred at this point that most species members can exchange tumor cells without rejection.

From the Old Testament, containing the Atlantean Mystery teaching, we learn that mankind was created male-female, bi-sexual, and that each one was capable of propagating his species without the co-operation of another, as is the case with some plants today.

I readily admit it is easy to make of horses what we will. Silent, in some ways reserved, they allow us to train them, and to project our ideas upon them; to ride and drive them, and to make them symbolic, perhaps to a greater degree than any other species.

There are times when you do have to bring animals into captivity to save a species like California Condors, or Arabian Aurochs. But they have something called species survival plans, and they do it in a very thoughtful way and are careful with the genetics.

I guess Species was a movie made for me and hence I bagged the role. In fact even when acting, I never thought the outcome would be so good which I think it was! The entire role was a challenge. I was to be this strange yet sexy thing which was challenging!

We find all kinds of species that have taken up a second chromosome or a third one from somewhere, adding thousands of new traits in a second to that species. So, people who think of evolution as just one gene changing at a time have missed much of biology.

I had found again and again that the most aberrant population of a species - often having reached species rank, and occasionally classified even as a separate genus - occurred at a peripheral location, indeed usually at the most isolated peripheral location.

Planting native species in our gardens and communities is increasingly important, because indigenous insects, birds and wildlife rely on them. Over thousands, and sometimes millions, of years they have co-evolved to live in local climate and soil conditions.

In every advanced mammalian species that survives and thrives, a common anthropological characteristic is the fierce behavior of the adult female of the species when she senses a threat to her cubs. The lioness, the tigress and the mama bear are all examples.

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