A large x1.6 solar flare erupted from sunspot AR2158 on Wednesday afternoon, disrupting high frequency radio transmissions for over an hour as ultraviolet radiation bathed the upper atmosphere ionizing the upper layers. This second solar flare is the most powerful of the two that were emitted in as many days. The first significant flare one […]
CAMBRIDGE, Mass. — When a segment of a major fault line goes quiet, it can mean one of two things: The “seismic gap” may simply be inactive — the result of two tectonic plates placidly gliding past each other — or the segment may be a source of potential earthquakes, quietly building tension over decades until […]
One of the most visible signs of climate change in recent years was not even visible at all until a few decades ago. The sea ice cap that covers the Arctic Ocean has been changing dramatically, especially in the last 15 years. Its ice is thinner and more vulnerable – and at its summer minimum […]
Scientists have discovered and described a new supermassive dinosaur species with the most complete skeleton ever found of its type. At 85 feet (26 m) long and weighing about 65 tons (59,300 kg) in life, Dreadnoughtus schrani is the largest land animal for which a body mass can be accurately calculated. Its skeleton is exceptionally complete, with […]