Darwin visited four continents on the ship HMS Beagle. Darwin’s theory of evolution by natural selection challenged the idea that God made all the animals and plants that live on Earth.

Natural selection is a mechanism of evolution. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success. This process causes ...

In fact, it is this facet of natural selection that is easily and massively documented in the DNA record of evolution. “Variations neither useful nor injurious...would be left a fluctuating ...