#greatlakes
Today is World Ocean Day!
Our planet is an ocean planet: Earth Is Blue. The National Marine Sanctuary System protects some of the most iconic underwater places throughout the United States, but we can’t do it without you. No matter where you are, the ocean and Great Lakes are in your hands. From the air we breathe, climate regulation, providing food, and economic benefits, the ocean supports life on our planet.
Tell us what your favorite thing about the ocean is!
(Photo: Matt McIntosh/NOAA. Image description: Surfer riding a wave in an orange sunset.)
Sinkholes are like a time capsule, taking us back to how Earth may have appeared approximately 2.5 billion years ago, at the beginning of the Proterozoic Eon.
Since the sinkholes were discovered in 2002, scientists from around the world have collaborated with Thunder Bay National Marine Sanctuary to research this time capsule.