The Earth is big. There are huge natural forces that have worked over geological time. But it turns out, when you look carefully at the geological time, you can't find anything like us.

It doesn’t much matter whether people care or don’t care. What matters is that people change the world.

It may seem impossible to imagine that a technologically advanced society could choose, in essence, to destroy itself, but that is what we are now in the processnof doing.

If in your lifetime you watch a species go extinct, or plummet almost to the point of extinction, that is a sign that something really serious is going on.

Neanderthals were pretty smart, and if we actively killed them off, then probably we did so in the same way that humans kill each other.

Though it might be nice to imagine there once was a time when man lived in harmony with nature, it’s not clear that he ever really did.

Humans will eventually become extinct. People treat that as a radical thing to say. But the fossil record shows us that everything eventually becomes extinct.

Most of us live in parts of the world where we don't expect to see much, and we wouldn't necessarily notice things that are crashing.

There's this idea of shifting baselines. It was coined by a guy named Jeremy Jackson. It's the idea that every generation takes what it sees, and says, "Okay, well, that's the norm."

No matter what Donald Trump says, it's clear that global warming is rapidly changing conditions on our planet.

In a poll commissioned by Time and CNN, two-thirds of American parents said they think that their children are spoiled.

The true value of something is the portion of your life you are willing to trade for it.

In my afternoon walk I would fain forget all my morning occupations and my obligations to society.

Belief in truth begins with doubting all that has hitherto been believed to be true.

Cancer research is a growth industry.

That we have some history together that hasn’t happened yet.

I come more and more to the conclusion that one must take the side of the minority which is always the more intelligent one.

It feels good to come here and be a winning program.

As if one crime of such nature, done by a single man, acting individually, can be expiated by a similar crime done by all men, acting collectively.

... A rule of thinking which would absolutely prevent me from acknowledging certain kinds of truth if those ... truths were really there, would be an irrational rule.

I like walking into the studio everyday and having completely custom, diverse artwork to do. And my clients keep the interesting ideas flowing in.