Explaining The Ocean on Instagram: "🌊 Orcas and dolphins may look different, but they’re actually part of the same family—the Delphinidae, or oceanic dolphins. Orcas, often called “killer whales,” are simply the largest species of dolphin. Like their smaller cousins, they’re highly social, intelligent, and use echolocation to hunt and communicate. But here’s the twist: despite being relatives, orcas are also known to prey on dolphins. As apex predators, they’ve been observed hunting dolphins in

NASA Earth on Instagram: "Arctic sea ice this year tied for the 10th lowest on record, @nasa and @nsidcnews report. Sea ice—or frozen seawater—forms and melts directly in the ocean and is different from icebergs or glaciers, which come from land-based ice. Every year around September, Arctic sea ice reaches its minimum extent. This year, sea ice reached its yearly minimum extent of 1.78 million square miles on Sept. 10, tying with 2008 as the 10th-lowest on record. #earth #NASA #ice #seaice #sci