Ancient Quote by P. E. Cleator

This world has seen a great many civilizations. And many of them have survived for longer periods than ours up to the present. They…

— Thor Heyerdahl

I'm a student of history and know that civilizations get lost - they are born and die - and so I recognize the tender…

— Gangaji

I don't think we're crumbling as a civilization, but this is not our finest hour, and it's good to be mindful that we're all…

— Mel Gibson

A civilization which has taken over the world cannot be said to be dying.

— V. S. Naipaul

“What did happen to Mars, anyway? Our next door neighbor, the Red Planet, apparently was once covered with flowing rivers. What happened to them?…

— Joseph C. Jenkins

How old the world is! I walk between two eternities.... What is my fleeting existence in comparison with that decaying rock, that valley digging…

— Denis Diderot

“Mars … is dying.” “How”

— James Cox

Every high civilization decays by forgetting obvious things.

— Gilbert K. Chesterton

The civilization you sit in ... is now obvious in crisis, perhaps death pangs, twisting grotesquely like a dying animal, swirling down the garbage…

— Peter Kreeft

Historically, if you look at great civilizations, why do they crumble? Is it because of what's outside or because of something internal? It's always…

— Phylicia Rashad

Long ago Mars was an oasis of running water.Today the Martiansurfaceis a sterile,barren desert. Here on Earth, who knows what climactic knobs we unwittingly…

— Neil deGrasse Tyson

“When the first humans set foot on Mars, the moment will be more significant in terms of technology, philosophy, history, and exploration than any…

— Stephen L. Petranek