Two orcas named Port and Starboard have been killing great whites and tearing out their organs, scientists say, causing sharks to flee the area en masse.
Sponges spotted a half a mile below the Arctic sea ice had researchers "jumping for joy" according to a study co-author.
Deep-sea mountain ranges were once ravaged by intensive fishing. After decades of federal protection, scientists returned to find life.
Bitumen from the oilsands could impact marine ecosystems in 15 ways, scientists say.