Super-Earths are how we call a family of planets... up to two times larger and about ten times more massive than the Earth.
If there is one phrase or action that every person on the planet would like to erase from his or her memory or have the chance to undo, it would be, 'Let's do it again.'
If you could drive straight down, into a tunnel bored through the crust of the planet, you'd hit this molten mess in about an hour. It's called the asthenosphere - a sluggish sea, several hundred miles thick, on which floats the Earth's cool epidermi...
We must reduce all the emissions that are destroying the planet. However, that requires a change in lifestyle, a change in the economic model: We must go from capitalism to socialism.
For the sake of our health, our children and grandchildren and even our economic well-being, we must make protecting the planet our top priority.
Yet, history has shown that if material force can defeat some ideologies it can no longer obliterate a civilization without destabilizing the whole planet.
Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill.
I haven't a clue if there is life on other planets but I'd be charmed if we found a unicellular organism on Mars. It would change our whole concept of life on Earth.
We have every resource necessary to provide access to education for every child on the planet; we just need to commit to enabling it.
To understand how quickly we're cooking the planet, we need good data. To have good data, we need good satellites.
In securing the future of the planet, we secure happiness for ourselves. One of the aims of the Greens is to turn around the tide of pessimism amongst the young people of the world.
I joined the Safe Climate Caucus because I believe in leaving a safer planet for future generations.
And when you're on your own there is that terrifying possibility that you may be the only person on the planet who thinks it's funny - and you have no way of finding out.
I thought, I'm only going to be on this planet once, and only for a short time. What can I do with my life that will lead to permanent benefits?
There are two or three performances in your life that are absolutely on, where all the planets are lined up for you and you feel you're invincible.
You can print money to bail out a bank, but you can't print life to bail out a planet.
To die is one thing. How much worse to know that all the life that ever existed on this planet, and all it ever achieved, was to be obliterated?
The thing that sets Mars apart is that it is the one planet that is enough like Earth that you can imagine life possibly once having taken hold there.
You know, something happened to me when I became 70. I started to feel a tremendous love for the human race, and life and this planet, the universe, the whole shebang.
I'm learning something all the time. That's the way I want it to go, and that's the way I'll go until I am no longer on this planet.
There are still so many places on our planet that remain unexplored. I'd love to one day peel back the mystery and understand them.
