This is 99% invisible. I'm Roman Mars.

In 2015, the world was divided into two warring factions, seemingly overnight,

and at the center of this schism was a single photograph.

Social media is exploding this morning with a debate about one dress.

The simple question is what colors do you see black and blue or white and gold?

It's blue and black.

It is white and gold.

It's blue and black.

I really see white and gold.

It's blue and black.

It's finally time for me to break my silence.

I see white and gold.

If you've been living off the grid and under a rock, I'm here to tell you that once upon a time a photo of a dress took over the internet.

In 2015, Cecilia Bleasdale took a picture of a dress that she planned to wear to her daughter's wedding.

And that photo went so viral that it literally slowed down the internet.

If you haven't seen it yet, Google it, because depending on how your brain works, you either see it as blue with black trim or white with gold trim, with absolutely no room in between for debate.

But back in 2015, while the rest of us were bickering over black versus white

versus blue versus gold, science writer Adam Rogers knew this story was way more than just a popular meme.

You could tell that the biggest story in the country

for the next eight hours was a science story. And it was a science story and it was a science of vision and neuropsychiatry and

neurobiology and color. This is Adam by the way he was working as the science

editor at Wired at the time.

...