Divers in the Philippines watched the ocean floor shake when a powerful 5.7-magnitude earthquake caught them underwater.
Human divers have long known that they risk heart trouble every time they make for deeper depths. Holding your breath places strain on your heart, and the longer you do it for during physical exertion, the more you risk. Now new research has found that even mammals meant for deep-diving, like seals and dolphins, run these risks, proving that there are some things the heart simply cannot overcome.
When it comes to elephant seals, it seems the fatter the better. You would think that more weight would prevent these deep-divers from reaching deeper water, but in fact it is beneficial.
This past weekend, divers off the Florida coast were bold enough to offer their assistance to a silky shark they encountered with a fishhook stuck in its mouth.