Earth Quotes by Stephen Hawking

Earth might one day soon resemble the planet Venus.

— Stephen Hawking

I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to…

— Stephen Hawking

Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space.

— Stephen Hawking

Life on Earth is at the ever-increasing risk of being wiped out by a disaster, such as sudden global nuclear war, a…

— Stephen Hawking

The life we have on Earth must have spontaneously generated itself. It must therefore be possible for life to generate spontaneously elsewhere…

— Stephen Hawking

Because imaginary time behaves like another direction in space, histories in imaginary time can be closed surfaces, like the surface of the…

— Stephen Hawking

Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change…

— Stephen Hawking

“The earth was initially very hot and without an atmosphere. In the course of time it cooled and acquired an atmosphere from…

— Stephen Hawking

“This means it will take about a thousand million million million million years for the earth to run into the sun, so…

— Stephen Hawking

Life on Earth is at the ever-increasing risk of being wiped out by a disaster, such as sudden global warming, nuclear war,…

— Stephen Hawking

Not to leave planet Earth would be like castaways on a desert island not trying to escape...Sending humans to other planets ...…

— Stephen Hawking

I think the human race doesn't have a future if we don't go into space. We need to expand our horizons beyond…

— Stephen Hawking

Bodies like the earth are not made to move on curved orbits by a force called gravity; instead, they follow the nearest…

— Stephen Hawking

We think that life develops spontaneously on Earth, so it must be possible for life to develop on suitable planets elsewhere in…

— Stephen Hawking

So when people ask me if I believe God created the universe, I tell them that the question itself makes no sense.…

— Stephen Hawking

Gravity is so strong that space is bent round onto itself, making it rather like the surface of the earth. If one…

— Stephen Hawking

One can see from space how the human race has changed the Earth. Nearly all of the available land has been cleared…

— Stephen Hawking

This required abandoning the idea that there is a universal quantity called time that all clocks measure. Instead, everyone would have his…

— Stephen Hawking

Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change…

— Stephen Hawking

If we can avoid disaster for the next two centuries, our species should be safe as we spread into space. If we…

— Stephen Hawking