In the year 2050 a something unimaginable happened, the Sun the star that gave us light and heat went of and no one knows how, the sea creatures were the ones to be affected first, one animal that went through a the biggest change was the Whale its adaptation throughout the years are magnificent.
In 3100 their tail faded away
3160 they fully developed all their adaptations to their new environment
they decided to move to a place were their was water but next to land do they moved next to lakes and rivers, in some places the water was frozen but in other places they weren't so they used that to go out on land to get their food, the earth is mostly frozen only certain animals survived and those animals were the whales food source.
Evidence of evolution
some of the adaptation of the whale were teeth they grew teeth so they can eat food on the land, their fins got stronger so they can use them as support, they started to grow legs, they got night vision
In 2051 their fins got stronger so they can use them for support when they go out for food
In 3025 they grew lungs because most of their food was on land
In 3075 they fully developed their legs
In 2090 they started to grow legs and they started to grow teeth so they can eat
In 2040 they started to get night vision so they can see in the Dark
In the year 4050 our world got into an other solar system, the humans that still existed found fossils of the whale and the saw all the evolution that this animal went through like how they started to grow legs and teeth.