探索动物如何随着时间进化

How have animals change over time?

Give an example of a species that has changed?

How might an animal change or adapt if...? (give varied scenarios)

The Science Behind the Science
Charles Darwin's seminal piece, On The Origin of Species, lays out the fundamentals of evolution. It describes how animals have adapted to work under the rules of 'survival of the fittest'. This means that an individual animal in a species is more likely to mate and pass their genes on if they have adapted to their environment better than their competitors. 

Take a fish, for example. All of the fish in one species are red. A species of shark eats this type of fish and can see red colours clearly in the ocean. A fish is born and is another colour, say silver for example, due to a genetic mutation. The shark cannot see silver as easily and preys upon the red fish in the species first. This means the silver fish is able to breed more, which means more silver fish are born. As the next generation of silver fish still survive for longer periods than the red fish they can also breed and give birth to even more silver fish. This cycle will continue until all fish are silver. This is survival of the fittest in an idealised example, but it explains one way of how animals adapt to their environment over time.