Water is the magic molecule essential to our biochemistry Seattle Times

When NASA’s $820 million rovers Spirit and Opportunity discovered signs of ancient standing water on Mars, there was obvious excitement.
The agency’s search for alien life is based on the strategy: “follow the water,” and for obvious reasons.
The only life we know is built on a scaffolding of carbon that floats in bags of water. Bacteria or brontosaurus, we’re all made from the same basic recipe.