Oceans
- 			 Oceans OceansSatellite data reveal nearly 20,000 previously unknown deep-sea mountainsBy looking for tiny bumps in sea level caused by the gravity of subsurface mountains, researchers have roughly doubled the number of known seamounts. 
- 			 Earth EarthA massive cavern beneath a West Antarctic glacier is teeming with lifeA subglacial river has carved out the cavern beneath the Kamb Ice Stream, a West Antarctic glacier, and may be supplying nutrients necessary for life. By Douglas Fox
- 			 Oceans Oceans‘Jet packs’ and ultrasounds could reveal secrets of pregnant whale sharksOnly one pregnant whale shark has ever been studied. New underwater techniques using ultrasound and blood tests could change that. 
- 			 Oceans Oceans50 years ago, researchers discovered a leak in Earth’s oceansAn analysis of oceanic rocks hinted that ocean water drains into Earth’s mantle. How much makes it back into the ocean remains unclear. 
- 			 Climate ClimateMany Antarctic glaciers are hemorrhaging ice. This one is healing its cracksScientists have explored the recesses of an Antarctic glacier that is currently stable, helping improve predictions of the continent’s fate. By Douglas Fox
- 			 Oceans Oceans50 years ago, scientists discovered the Great Pacific Garbage PatchIn 1973, plastic bottles adrift in the North Pacific alarmed scientists. Fifty years later, more than 1.8 trillion pieces of plastic litter the area. By Demian Perry
- 			 Climate ClimateRapid melting is eroding vulnerable cracks in Thwaites Glacier’s underbellyThwaites is melting slower than thought, but the worst of it is concentrated in underbelly cracks, threatening the Antarctica glacier’s stability. By Douglas Fox
- 			 Paleontology PaleontologyIn the wake of history’s deadliest mass extinction, ocean life may have flourishedOcean life may have recovered in just a million years after the Permian-Triassic mass extinction, fossils from South China suggest. By Nikk Ogasa
- 			 Science & Society Science & SocietySea life offers a lens for self-exploration in ‘How Far the Light Reaches’In a collection of essays profiling 10 marine animals, author Sabrina Imbler mixes in stories of their own family, self-discovery, sexuality and healing. By Aina Abell
- 			 Ecosystems EcosystemsTiger sharks helped discover the world’s largest seagrass prairieInstrument-equipped sharks went where divers couldn’t to survey the Bahama Banks seagrass ecosystem. By Nikk Ogasa
- 			 Oceans OceansSharks face rising odds of extinction even as other big fish populations recoverOver the last 70 years, large ocean fishes like tuna and marlin have been recovering from overfishing. But sharks continue to decline toward extinction. By Jake Buehler
- 			 Climate ClimateHere’s what happened to the Delaware-sized iceberg that broke off AntarcticaThe powerful pull of currents in the Southern Ocean probably pulled apart the largest remnant of a massive iceberg that split off Antarctica in 2017.