Thus it seemed to Haeckel that such simple life could easily be produced from inanimate material.

It was only about sixty years ago that the expansion of the universe was first observed.

In many biological structures proteins are simply components of larger molecular machines.

Biology has progressed tremendously due to the model that Darwin put forth. But the black boxes Darwin accepted are now being opened, and our view of the world is again being shaken.

In the 19th century the anatomy of the eye was known in great detail and the sophisticated mechanisms it employs to deliver an accurate picture of the outside world astounded everyone who was familiar with them.

Proteins are the machinery of living tissue that builds the structures and carries out the chemical reactions necessary for life.

The basic structure of proteins is quite simple: they are formed by hooking together in a chain discrete subunits called amino acids.