
He cell is the basic building block of life. In its 3.5 billion years on the planet, it has proven to be a powerhouse, spreading life first throughout the seas, then across land, developing the rich and complex diversity of life that populates the planet today. --

"I studied physics (a long time ago), then trained as a science and maths teacher. After that, I worked at London’s Science Museum in the Education Unit – and in the museum’s flagship interactive gallery, Launch Pad. I left the museum in 1991 to write science and technology books and to write and perform science shows in museums, libraries and schools. Recently, I worked for two years on the development of science television programs for BBC Scotland." Source: http://explaining-science.co.uk/
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