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Human survival is something that you can't see in another person; you can see if someone has that will to survive or that will to win; you can't see that, you can only watch that evolve over time.

It is the cells which create and maintain in us, during the span of our lives, our will to live and survive, to search and experiment, and to struggle.

Every animal would rather die themselves than lose their offspring. But it's just genes, isn't it? All of our existence is spent worrying about the next generation, but we don't actually seem to get anywhere.

Families survive, one way or another. You have a tie, a connection that exists long after death, through many lifetimes.

There's a misconception that survival of the fittest means survival of the most aggressive. The adjective 'Darwinian' used to refer to ruthless competition; you used to read that in business journals. But that's not what Darwinian means to a biologist; it's whatever leads to reproductive success.

To sustain longevity, you have to evolve.

Extinction is the rule. Survival is the exception.

To continue living, we have to die. That's the story of humanity - generation after generation - that we are going to die. There's nothing dramatic about death except that one loses one's life.

Both individual fulfillment and the ecological balance of life on this planet are best served by dying when our inherent biology decrees that we do.

When a trait is universal, evolutionary biologists look for a genetic explanation and wonder how that gene or genes might enhance survival or reproductive success.