(CNN) A cake trumped gravitational waves.
Scientists had placed a 10:30 a.m. embargo on Thursday's news that they'd discovered gravitational waves, thus proving a key element of Einstein's theory of general relativity and rocking the scientific community.
Gravitational waves detected, proving Einstein right
But thanks to a casually tweeted photograph of a celebratory cake, the news got out 16 minutes early.
The guilty party was a University of Maryland research associate named Erin Lee Ryan, who works at NASA's Goddard Space Flight Center.
How we made the gravitational wave discovery
She told The Washington Post that she wasn't aware the embargo was still active, and that other employees had also taken pictures of the cake. However, she was the one whose tweet was noticed.
"When I saw all the retweets I just thought: 'Oh no,' " Ryan said. "I mean, this is the second time I've wound up tweeting a cake before an embargo!"
Yes, it's happened before.
In 2013, Ryan tweeted a cake that revealed an observation about the Saturn moon Titan.
That time she was told to "chill with the tweeting for a week or so."
This time her Ph.D. adviser sent her an email with the subject line "Bad Girl" and a "see no evil" emoji.
Ryan has had a good sense of humor about the whole thing.
"Due to my cake tweets: collaborators now thinking we must announce our results with cake," she tweeted. "I like this plan."
Well, it took 1.3 billion for the gravitational waves to find their way to Earth. What's 16 minutes?