Noctilucent clouds appear most commonly around June for Earth’s high latitudes. These mysterious "night-shining" clouds are beautiful ... see photos here.
Is the South Atlantic Anomaly a sign that a magnetic pole flip on Earth is imminent? No, say researchers who analyzed 9,000 years of magnetic field history.
Studying rivers from space using satellite imagery helps scientists see how rivers can suddenly change course, bringing the risk of flooding to communities.