DNA (deoxyribonucleic acid), the molecular "blueprint" carrying the genetic instructions that influence the growth, ...

A fossil is the preserved remains or traces of a dead organism. The process by which a fossil is formed is called fossilisation. It’s very rare for living things to become fossilised.

As it cools it becomes a very hard type of igneous rock. This one first formed over 350 million years ago. Then, millions of years after that, during the last ice age - when the land was covered ...

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