If there's anything that shows you how far Katie Ledecky has come in such a short amount of time, it's this awesome throwback picture of her and Michael Phelps.
In 2006, i.e., right when Phelps had begun his ascent into superstardom, Ledecky was just a 9-year-old. And then she met him.
Back then, Ledecky was just a fan and Phelps who was two years removed from winning six gold medals at the summer Olympics in Athens. Now, they're teammates who are racking up medals together.
Back then, Ledecky was a kid. Now, Michael Phelps actually has a kid.
The more you think about it, the easier it is to see just how bananas it is that Katie got this good, this fast. Remember, she actually won gold already before these games at the 2012 Olympics in London.
Now she's just taking things to another level. On Wednesday, she entered the pool during the 4x200m relay final with a deficit. She would later exit with an insane lead for the US.
As for Phelps, he's obviously still doing his thing, on course to add six more medals to his name, just as he'd done before he met Katie Ledecky for the first time.