Hitting the redo button on evolution

Scientists are experimenting with bacteria to see if evolution plays out the same way every time

By Tina Saey, 00:00 AM February 11, 2009

People have always wondered why plants and animals are built the way they are. Charles Darwin, an Englishman who lived in the 1800s, was very curious about the shape of life forms, and did lots of experiments to find some answers. He came up with the theory of evolution, which helps explain how life on Earth came to be in its many forms.


A big part of Darwin’s evolution theory is a process called natural selection — you might have heard it called “survival of the fittest.” Natural selection s...

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