Every evening, after twilight gives way to dark, hordes of marine creatures—from tiny zooplankton to hulking sharks—rise from the deep to spend the night near the surface. They revel in the upper waters, feeding and mating, before retreating back down before dawn. Known as the diel vertical migration, this mass movement is often heralded as […]

One of the ocean’s most fearsome predators is muscling into new parts of the icy Arctic Ocean. Orcas, also known as killer whales, are showing up in places they’ve never been spotted before. Scientists believe melting sea ice is to blame. “[Killer whales] will normally avoid ice to avoid entrapment and suffocating,” said Brynn Kimber, […]