Researchers have identified a second possible impact crater in northwest Greenland, just over 100 miles from the Hiawatha crater announced in November 2018. Last November, scientists’ minds were blown by the discovery of a 19-mile-wide crater under Greenland. The crater had been hiding in plain sight just 150 miles from a major […]

Under certain conditions, a reef can support either a thriving coral community or a lush seaweed field, depending on what it started with. Credit: Kai Kopecky, Russ Schmitt Tropical reefs are vulnerable ecosystems, sensitive to a variety of environmental conditions and disturbances, which can change their composition from vibrant coral […]