It's a big deal when an oil tanker spills its contents into the ocean. And for good reason. But what about oil spills that aren't caused by humans?
Dolphins have evolved to live in an aquatic environment, and like bats, they can use sonar to locate prey by emitting different frequencies of sounds.
Many ocean-going life forms draw calcium from the water around them, and use it to secrete a hard exoskeleton, seashells for example.
Most grains of sand originally started as part of a larger rock.
Most people would imagine that the Earth's rotation would be immune to our tampering. As it turns out, this isn't the case.
Most people know about the mass extinction of the dinosaurs, but did you know there have been about twenty-three mass extinctions since life began on earth?
Most of the excess heat trapped by greenhouse gasses like carbon dioxide actually ends up in the oceans.
If you were sailing far from shore, how would you feel about a tremendous tsunami heading your way?
For centuries mariners have told stories of ships sunk by huge isolated ocean waves, often in perfectly clear weather.
You may have heard that global warming will result in more hurricanes that are larger and more destructive. In fact, most scientists believe this to be true.