 Hello, everyone. Today, I will guide you through a journey into the past. Let's travel back 80 million years ago. We can tell from the fossil record that at that time, there was a small organism that vaguely resembled present-day primates. This is the common ancestor of all primate species. At some point during that time, there was a group of these individuals that became isolated from the rest, and these two groups started to evolve independently, which means that their genomes accumulated mutations that were unique for each of the groups. At some point, they accumulated so many mutations that they could no longer mate. This is called an speciation event. Throughout primate evolution, there's been many speciation events that has led to the creation of all these different primate groups. But the question is, how can we date back something that happened millions of years ago? Well, mutations have left a footprint in our genomes. So I took advantage of this by analyzing the accumulated mutations in the genomes of 50 different primate species, spanning all primate groups. And I was able to date back when these speciations event happened, and also I was able to reconstruct the primate tree of life. But not only that, I can also get information about how specific genes have evolved. For example, by looking at the accumulated mutations, I found that immune system genes have accumulated a lot of mutations, which means that these genes are evolving very fast. This makes sense because new mutations mean that genes can acquire new functions that can help us fight new diseases. On the other hand, I found that genes with very basic cell functions have accumulated very few mutations, which means that they are evolving much more slowly. This also makes sense because if a gene has a very basic, essential function for the survival of an individual, then it tends to be kept unchanged. As you can see, we can use present-day primate genomes to understand primate evolution. So, what is the next step? Well, I am very interested in learning more about this by looking at what is the interplay between natural selection and the evolution of genes in primates to understand which genes are the most important in the genomes of us humans. So, these are 80 million years of primate evolution in less than three minutes. Thank you.