All vertebrates are related even if they look very different from one another.

Let's look at the tuna and the parrot.

Follow the histories of the tuna and parrot back to the point where they share the most recent common ancestor.

Click on the green dot that best shows where that common ancestor existed.

By following the lineages back to where they intersect you find their point of common ancestry.

Follow each lineage back to the point where they meet. Try again!