One thing we can all agree on, no matter our diverse beliefs, is that cute animals are just the best.

And recently, a single tweet by the Smithsonian’s National Zoo started an adorable trend that reminded the world of that. They shared a picture of a new gray seal pup, and not long after that, other zoos and aquariums got in on the action. This is when the #CuteAnimalTweetOff was born.

This tweet probably wasn’t mean to start a cute animal movement, but that’s exactly what it did.

Soon, the Virginia Aquarium formally challenged the National Zoo by sharing this delightful duo.

Before long, Twitter became flooded with adorable animals, like these two who live at the Bronx Zoo.