Life Quote by Carl Sagan

I'm a big fan of when you model a character as someone with a biological origin, doing deep dives and a lot of research.

— Mark Waid

“The principal energy sources of our present industrial civilization are the so-called fossil fuels. We burn wood and oil, coal and natural gas, and,…

— Carl Sagan

We don't need to clear the 4 to 6 percent of the Earth's surface remaining in tropical rain forests, with most of the animal…

— E. O. Wilson

Seventy percent of Earth's surface is water and over 99 percent is uninhabited, so you would expect nearly all impactors to hit either the…

— Neil deGrasse Tyson

The single best thing about Mars is the reduced gravity. It's 38 percent of Earth's gravity - about one third. Almost never have you…

— Robert J. Sawyer

“The combined activities of our enormous population are already producing breathtaking effects. Our planet is only 12,700 kilometers in diameter—about three times the distance…

— Thomas Homer-Dixon

“A mere sixty-five million years ago (less than two percent of Earth’s past), a ten-trillion-ton asteroid hit what is now the Yucatan Peninsula and…

— Neil deGrasse Tyson

“Our march toward self-annihilation has already obliterated ninety percent of the large fish in the oceans and wiped out half of the mature tropical…

— Chris Hedges

“Oceans today represent only about 0.02 percent of Earth’s total mass, while the atmosphere is no more than one part per million of its…

— Robert M. Hazen

“Consider that in 1800 Western powers claimed 55 percent but actually held approximately 35 percent of the earth's surface, and that by 1874 the…

— Edward Said

The entire range of living matter on Earth from whales to viruses and from oaks to algae could be regarded as constituting a single…

— James Lovelock

By going to Pluto, we have a chance to anchor, with real data, models of the early evolution of Earth's atmosphere.

— Alan Stern