Sadly, it's much easier to create a desert than a forest.

Sadly, it's much easier to create a desert than a forest.

I'm a scientist, not a theologian. I don't know if there is a God or not. Religion requires certainty. Revere and respect Gaia. Have trust in Gaia. But not faith.

If we gave up eating beef we would have roughly 20 to 30 times more land for food than we have now.

NASA will send up a big sun shade that will be in orbit between the earth and sun and deflect 2 or 3 percent of the sunshine back into space. It would be cheaper than the international space station.

There is little evidence that our individual intelligence has improved through recorded history.

Science always uses metaphor.

One thing that being a scientist has taught me is that you can never be certain about anything. You never know the truth. You can only approach it and hope to get a bit nearer to it each time. You iterate towards the truth. You don't know it.

If it hadn't been for the Cold War, neither Russia nor America would have been sending people into space.