The future doesn't exist. The only thing that exists is now and our memory of what happened in the past. But because we invented the idea of a future, we're the only animal that realized we can affect the future by what we do today.

A sponge is a funny animal to center a show on. At first, I drew a few natural sponges - amorphous shapes, blobs - which was the correct thing to do biologically as a marine science teacher. Then I drew a square sponge, and it looked so funny.

I love things made out of animals. It's just so funny to think of someone saying, 'I need a letter opener. I guess I'll have to kill a deer.

Never fight an inanimate object.

They took their meals together; and it was remarked on such occasions, when the friendship of animals is put to a hard test, that they never quarrelled or disputed the possession of a favourite fruit with each other.

It is difficult to obtain the friendship of a cat. It is a philosophical animal... one that does not place its affections thoughtlessly.

Even an animal, if you show genuine affection, gradually trust develops... If you always showing bad face and beating, how can you develop friendship?

False friendship, like the ivy, decays and ruins the walls it embraces; but true friendship gives new life and animation to the object it supports.

Perhaps one reason we are fascinated by cats is because such a small animal can contain so much independence, dignity, and freedom of spirit. Unlike the dog, the cat's personality is never bet on a human's. He demands acceptance on his own terms.

The truth is I love being alive. And I love feeling free. So if I can't have those things then I feel like a caged animal and I'd rather not be in a cage. I'd rather be dead. And it's real simple. And I think it's not that uncommon.

In all works on Natural History, we constantly find details of the marvellous adaptation of animals to their food, their habits, and the localities in which they are found.

The industrial food system is so cruel and so horrific in its treatment of animals. It never asks the question: 'Should a pig be allowed to express its pig-ness?'

I don't want food that comes from animals that are caged up and fed antibiotics. I am really suspicious of that kind of production of meat and poultry.

Man seems to be the only animal whose food soils him, making necessary much washing and shield-like bibs and napkins. Moles living in the earth and eating slimy worms are yet as clean as seals or fishes, whose lives are one perpetual wash.

Of course, animals have to be killed for food or to prevent their doing injury to others or to property. But such killing is too often carried out without regard to the pain inflicted.

Kip Keino, Moses Tanui, Paul Tergat, they all come from my tribe. Some say it is the food we eat that makes us strong, the way we live. In the history of our people we wear no clothes and we are used to drinking the blood of animals.

In most of the world, it is accepted that if animals are to be killed for food, they should be killed without suffering.

We can move water easily with plastic pipes. We can move shade around with nursery cloth like a tinker toy for animals and plants. Yet we have developed this necessity to grow food with chemical fertiliser because we have forgotten the magic of manure.

Meat is undoubtedly an environmentally expensive food. Large animals have inherently low efficiency of converting feed to muscle, and only modern broilers can be produced with less than two units of feed per unit of meat.

We have wild animals in zoos, yet people rarely meet their 'food' face to face.

Cats are very independent animals. They're very sexy, if you want. Dogs are different. They're familiar. They're obedient. You call a cat, you go, 'Cat, come here.' He doesn't come to you unless you have something in your hand that he thinks might be food. They're very free animals, and I like that.

Animals that we eat are raised for food in the most economical way possible, and the serious food producers do it in the most humane way possible. I think anyone who is a carnivore needs to understand that meat does not originally come in these neat little packages.

Animals are my friends... and I don't eat my friends.

My favorite animal is steak.