Organisms may have variations that help them survive. If so, they will reproduce and
pass those variations on to their offspring. This can lead to the formation of a new species.
One example is the Galápagos finches.
Darwin visited the Galápagos Islands in 1835. He was surprised by the number
of different finch
species that existed in such a small area. Each group of finches was adapted
to different regions, sources of food, and lifestyles.