PROTEIN: The Foundation of Life
…and why you should invite bacteria to your next family gathering.
Some scientists date rocks. This is no comment on their social lives, just their area of expertise. On the basis of their work we can give our planet a birthday party to honour its 4.65 billion years.
The Big Bang is a theory about the birth of the universe, which refers to an expansion – not an explosion – about 14 billion years ago. Eventually the sun and later the earth condensed from cosmic dust and gas thanks to the power of gravitational attraction. The contraction of these materials and the radioactivity of some of them created heat. Some elements melted and differentiated into the earth’s crust and core with spectacular volcanic eruptions and other escaping gases. Carbon dioxide, nitrogen and others were held by gravity and formed the primitive atmosphere. Water vapour condensed and our oceans formed.