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.

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.

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.

There are a lot of things that we could do to minimize what we're doing, but we're not getting back those frogs that I saw that no longer exist.

Mistakes are, after all, the foundations of truth, and if a man does not know what a thing is, it is at least an increase in knowledge if he knows what it is not.

Time lost can never be regained

You know you are getting old when people tell you how good you look.

There were certain qualities you possessed carelessly. And you couldn't retrieve them when they were gone. The very act of caring made them impossible to regain.

So I begged, half way into season two, for them to let me cut my hair.

[Possible Attorney General] that's a discussion I'd like to have with [Donald Trump].

This war is being played in the realm of public opinion and has dire consequences for our soldiers in Iraq, the future of our country, and freedom around the world.

An Osage tribal study found that between $41 million to $50 million left a 50-mile radius around their own casino

Throughout the day I often ask myself, Could I fall asleep right now? and the answer is always a resounding yes.

Love may be boundless and abundant, but time isn't. Time is finite.