Marie Tharp pioneered mapping the bottom of the ocean 6 decades ago – scientists are still learning about Earth’s last frontier
Despite all the deep-sea expeditions and samples taken from the seabed over the past 100 years, humans still know very little ...
14 Mysteries of the Ocean Scientists Still Can’t Explain
Here are more of the most stunningly beautiful underwater photos ever taken. Could there be an alien spaceship on the ocean ...