Introduction to evolution
evolutionThe process by which small changes in organisms occur over long periods of time and new species are formed. explains how the living things on our planet today have slowly developed from simpler life forms that lived millions of years ago. The first person who explained how evolution happens was Charles Darwin with his scientific theory of evolution.
Watch: Explaining evolution
Charles Darwin
Charles Darwin observed that although individuals in a speciesA group of living things with very similar characteristics. They can breed together to make more living things of the same type. shared similarities, they were not exact copies of each other; there were small differences or variations between them. He also noticed that everything in the natural world was competing to survive.
The winners were those which adapted or adjusted their characteristics to increase their chance of survival in the environment they were in. For example, if they were stronger, faster, cleverer or more attractive than others in their species. These living things were more likely to reproduce and pass on their useful characteristics to their offspring.
Individuals that were poorly adapted were less likely to survive and their characteristics were not as likely to be inherited.
Over time, the characteristics that help survival become more common and a species gradually changes. Given enough time, these small changes can add up to the extent that a new species altogether can evolve.
Charles Darwin published his scientific theory of natural selection in a book called 鈥極n the Origin of Species鈥 in 1859.
Darwin鈥檚 theory explained how every living thing is connected in a family tree that stretches back billions of years to the beginning of life on Earth.
Activity 1: Fill in the gaps
Activity 2: Evolution quiz
Activity 3: Writing like Charles Darwin
You can learn more about Charles Darwin by watching the clip below and reading these sheets from
Watch: Chares Darwin and Alfred Wallace
Research Charles Darwin and his discovery.
Pretend you are Charles Darwin living two hundred years ago.
Write a letter to your friend explaining about your 鈥榥ew鈥 theory of evolution.
You could always stain your letter to make it look old using a teabag.
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