View the TED-Ed Lesson Where do genes come from?
When life emerged on Earth about 4 billion years ago, the earliest microbes had a set of basic genes that succeeded in keeping them alive. In the age of humans and other large organisms, there are a lot more genes to go around. Where did all of those new genes come from? Carl Zimmer examines the mutation and multiplication of genes.
Seriously, if I could recommend anyone to explain this kind of thing (besides myself), it would be the great Carl Zimmer.
A wonderful video about where new genes come from and how we went from early organisms with just a few to the mélange of molecular instructions that we see on Earth today.
This is how evolution gets creative.