It's like trying to describe what you feel when you're standing on the rim of the Grand Canyon or remembering your first love or the birth of your child. You have to be there to really know what it's like.

It might be helpful to realize, that very probably the parents of the first native born Martians are alive today.

But I don't think we'll go there until we go back to the moon and develop a technology base for living and working and transporting ourselves through space.

I don't think the human effect [of climate change] is significant compared to the natural effect.

Time is, in fact, a cross to bear, it passes on inexorably and remorselessly, destroying everything in its wake, save art and works of the intellect.

In Antarctica, it looks like the total volume (of ice) is increasing and if that's true, that's probably why you're getting increased ice moving away from the center of the continent and therefore these big icebergs and stuff are breaking off.

Several indisputable facts appear evident in geological and climate science that make me a true 'denier' of human-caused global warming.