Tidal stresses and giant earthquakes

Tidal stresses and giant earthquakes By Ned Rozell [fusion_dropcap]A[/fusion_dropcap] scientist once noticed a connection between the stress that tides inflict on the planet and the number of small earthquakes that happen in some areas when that pressure is greatest. She saw a pattern to these earthquakes leading up to great tsunamis. A graduate student is [...]

Dinosaurs in the Wrangell Mountains

Dinosaurs in the Wrangell Mountains By Ned Rozell [fusion_dropcap]T[/fusion_dropcap]he more Tony Fiorillo explores Alaska, the more dinosaur tracks he finds on its lonely ridgetops. The latest examples are the stone footprints of two different dinosaurs near the tiny settlement of Chisana in the Wrangell Mountains. Fiorillo, a dinosaur hunter with the Museum of Nature and [...]

What Causes the Aurora Borealis?

What Causes the Aurora Borealis? By Larry Gedney and Vladimir Degen During the early 19th century, some of the best scientific minds of the period believed that the aurora was caused by the reflection of sunlight from tiny ice crystals suspended high in the atmosphere. It remained for the Norwegian physicist Anders Angstrom (1814-1874) to [...]