The Earth is mostly covered by oceans, we're a blue planet.
For a shark diving company with a cool blog this pretty much gives us an unlimited supply of items to cover, like, for example this latest weird news coming out of NOAA.
NOAA has a series of deepwater microphones listening for any underwater sounds they can hear. These listening stations have recently heard "strange noises" in our oceans.
But don't take our word for it, click this link and have a listen yourself. We're not even going to try a speculate what this sound might be...O.K, maybe aliens?