Evolution is a process of constant branching and expansion.

Orchids were not made by an ideal engineer; they are jury-rigged from a limited set of available components.

I am, somehow, less interested in the weight and convolutions of Einstein’s brain than in the near certainty that people of equal talent have lived and died in cotton fields and sweatshops.

Science is an integral part of culture. It's not this foreign thing, done by an arcane priesthood. It's one of the glories of the human intellectual tradition.

We cannot win this battle to save species and environments without forging an emotional bond between ourselves and nature as well - for we will not fight to save what we do not love.

Advocates for a single line of progress encounter their greatest stumbling block when they try to find a smooth link between the apparently disparate designs of the invertebrates and vertebrates.

Ordinary speciation remains fully adequate to explain the causes and phenomenology of punctuation.

Nothing is more dangerous than a dogmatic worldview - nothing more constraining, more blinding to innovation, more destructive of openness to novelty.

The center of human nature is rooted in ten thousand ordinary acts of kindness that define our days.

If genius has any common denominator, I would propose breadth of interest and the ability to construct fruitful analogies between fields.

Creationist critics often charge that evolution cannot be tested, and therefore cannot be viewed as a properly scientific subject at all. This claim is rhetorical nonsense.

It's hard knowing who to trust with your personal life. When you cry in your room at night, you don't always know who to call. So I am very close to my family.

The executions, persecution and imprisonment of political dissidents and the LGBT community, denial of free press, elections and religious freedoms, continue to be Fidel Castro's legacy.

When there's something or someone, when there's anything that makes you happy, you don't let a continent or an ocean or an empty pocket keep you apart

The secret to winning a woman is calculated neglect.

I may err in judgment, but I hope not in intention.

Most of the stone a nation hammers goes toward its tomb only. It buries itself alive.

Science and education, when devoid of a social conscience or environmental and human concern, are meaningless.

There are moments when tribulations occur in our lives, and we cannot avoid them. But they are there for some reason.

These have always been my legs. I train harder than other guys, eat better, sleep better and wake up thinking about athletics. I think that's probably why I'm a bit of an exception.

I experienced the judgement of a lot of people - and deservedly so.