Laboratory experiments, field observations and atmospheric modeling calculations have now established that chemical reactions occurring on PSC particles play a central role in polar ozone depletion.

A baby! I hated babies. I, who for two and a half years had been the center of a tender universe, felt the axis wrench and a polar chill immobilize my bones. I would be a bystander, a museum mammoth.

Every day, TV, newspapers, and the Internet bombard us with a message that we're destroying the earth. Ice caps are melting, rivers are dying, polar bears are drowning, and trees are doing something.

I think my mother was baffled by me. We were polar opposites. She was shy and retiring. I was over-fond of the limelight. Many times in my life, I was conscious of embarrassing her with my carrying on.

The entire North Polar ice cap is disappearing before our very eyes. It's been the size of the continental United States for the last 3 million years and now 40 percent is gone and the rest of it is going.

I think that I was slightly naive. I thought that if I showed people the beauty of the Arctic and the beauty of the polar bears that they would care so much that they would stand up and try to make a change.

By the mid-17th century, telescopes had improved enough to make visible the seasonally growing and shrinking polar ice caps on Mars, and features such as Syrtis Major, a dark patch thought to be a shallow sea.

You never know how things are going to turn out in a movie. You can imagine a scene one way, and it can turn out to be completely the polar opposite of what you expected. You just have to roll with the punches.

Demanding that our leaders take action on climate change is about a lot more than polar bears and ice caps; it's about safeguarding our health, preserving our prosperity, and protecting the future of our children.

All the characters on 'Girls' are growing and changing, which is how real people behave, especially when we're young, trying to figure out who we are, doing things that are the polar opposite of our characteristics.

We'll all die out eventually. Humans will be gone. And all I'm saying is, when people worry about polar bears disappearing or whatever, it's like, 'Well that's life, things will come and go, we'll find new species.'

The more we look at the kinds of soils and the nature of the atmosphere and the polar caps, it all adds up to tell us that some liquid, which we very much believe was water, did flow in abundance on Mars in the past.

The Safari Club International has worked the legal system hard to try to keep polar bears - threatened primarily by climate change, but also by hunting - on the list of creatures people can import as trophies after shooting.

It's the polar opposite of most people, but I absolutely hate carrying a ton of stuff onto a plane. I check in all my luggage and literally go through security with nothing other than my coat, in which I have my iPhone and iPad.

I haven't been to Tasmania. I haven't been to the South Pole, and I haven't been to the North Pole. I want to see the polar bear migration before there are no polar bears. I want to see Glacier National Park before the glacier melts.

Given enough time, polar bears might migrate off the Arctic ice, evolve darker coats, find a different diet, and thrive in a new, warmer climate. But if the ice on which they depend disappears in a few decades, they are likely to die.

Noah's daughter is different from the girls of 'Suburgatory.' She goes to Brown, so she's in college, and she's very smart. And his wife is very much a very strong woman. She's certainly in charge at his house. She's Dallas's polar opposite.

Young people, those who think they're experts in science, there's no doubt. They just believe it, and so there has to be an explanation - and whatever man is doing has caused the jet stream to slow down, and that is permitting the polar vortex.

The Polar Express is about faith, and the power of imagination to sustain faith. It's also about the desire to reside in a world where magic can happen, the kind of world we all believed in as children, but one that disappears as we grow older.

We were working under very harsh conditions on 'Zero Kelvin.' We were up there in the Arctic, closer to the North Pole than to a hospital. Sometimes you had to sleep in small Arctic tents with guns to protect yourself from polar bears and stuff.

In the sports world it's all about argument. It's all about having a hot take. The other person has to have the polar opposite opinion, and you bash them together. To me it is an outlier to have a conversation be the basis of why you are listening.

There's something known as the Uncanny Valley where things look a little too real and you're not quite sure what you're looking at. It becomes weird like it did in 'The Polar Express,' where the eyes seem so realistic, and yet you know it's animated.

I've been through the entire list of Polar problems. I knew it would be hard, but it's harder than I ever thought it would be. I've suffered from blisters, a high-altitude cough, frost nip, and I even managed to break a ski they told me was unbreakable.

There's one place, and one place only, to see polar bears in America. You have to travel to the country's northernmost point, the very apex of Alaska's North Slope, to the permafrost shores that stretch out on either side from the Inupiat town of Kaktovik.

I think that its easy to think of the environment as all doom and gloom and that, 'What can we do, it's too late. And the polar bears are gone, and everything is gone.' But really, just the little steps that we can make as individuals make a big difference.

When I was moving to New York in 1994, I saw an ad in the paper that said, 'Do You Measure Up To Be A Muppet?' I answered the ad and soon after met John Henson, who brought me in to understudy him for a real version of the computer generated Coca-Cola Polar Bear.

People travel and hunt on the sea ice - in Alaska, they hunt in skin boats for bowhead whales; in Greenland, they hunt with dogsleds. The ice is their highway. The ice is also the ecosystem in which marine mammals and terrestrial animals such as polar bears exist.

Polar' is based on the first and a little bit on the second book and all the characters from those novels are in there. The story is based on the graphic novel, but when it came to the execution of the film I felt I couldn't really make a movie without any dialogue.

When I read about how 200 people died on a polar expedition, I wonder why they didn't get to know the Inuit people who were around and presumably know something about surviving in the Arctic after living there for thousands of years. Talking to people is a survival mechanism.

I don't believe in a golden mean; I don't believe you find policy wisdom between two polar points. I don't dismiss that possibility, but I look at the platform that's so ideologically based, that's so dismissive of facts, of evidence, of science, and it's frankly hard to take seriously.

That's what I love about my faith and Christianity. It's the polar opposite of darn near everything I experienced in the wrestling business. I still love the business, and I'm thankful for everything that it's provided, but the idea that it deals in the truth is the furthest thing from reality.

I enjoyed the theatrics and the physical demands of everything that went on in the ring. But I was, initially, a relatively shy kid. I think that's probably what attracted me to hunting is that it was such a polar opposite of the other, and it was that opportunity for peace and quiet and to decompress.

For humans, the Arctic is a harshly inhospitable place, but the conditions there are precisely what polar bears require to survive - and thrive. 'Harsh' to us is 'home' for them. Take away the ice and snow, increase the temperature by even a little, and the realm that makes their lives possible literally melts away.

Three things about water affect almost all of cooking. First are the hydrogen bonds, which is why it has an incredibly high boiling point. Another is that it's a polar molecule, so that it dissolves a lot of things, and there are things that won't mix with it. And then there's how much energy it takes to heat water.

There is no sense in meddling with the extinction of polar bears, not when so many more pressing human problems await. Until there's ironclad proof of how and why extinction works, and how much evil we've done to hasten it along, I'm going to save my emotional anguish for dying and suffering members of my own species.

Producing is a wonderful foil to being an actor: acting being largely about getting out of my head, being present, a little irresponsible, whilst producing is the polar opposite. You need other players to act; you can't act in a void, but producing is about making something out of nothing - conjuring a thought or an idea into reality.

At the heart of every really good Christmas movie is the threat, I suppose, to Christmas. Something is wrong with Christmas, in all of these movies. In 'The Polar Express,' there's a kid that doesn't really believe, and that's the threat to Christmas. In 'Santa Claus: The Movie,' jealousy and greed are threatening to overrun his Christmas.

I remember when I was younger, and in school, our teachers showed us films of plastic in the ocean, starving polar bears and so on. I cried through all the movies. My classmates were concerned when they watched the film, but when it stopped, they started thinking about other things. I couldn't do that. Those pictures were stuck in my head.

My problem with my parents growing up was not that I was afraid to cry in front of them - they always wanted me to cry because they wanted me to be okay, but it felt kind of icky and gross to cry in front of my parents. So my problem was the polar opposite - I didn't want to cry in front of them because I didn't want to give them the satisfaction.

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