Another, lesser-known repeating pattern in solar activity is the Centennial Gleissberg Cycle (CGC) — a variation in the intensity of sunspot cycles that rises and falls every 80 to 100 years.

From regulatory rollbacks to coal resurgence, here are some of Trump’s most consequential actions since January 20.

Trees form a ring of wood every year, and the width ... understanding of past moisture patterns across the east coast of North America. It fills a large gap in climate research based on tree ...

Phoenix set records as it soared past 100 degrees April 10 and ... the record of 85 degrees set two years ago. As usual, the cause of the split weather pattern is the position of the jet stream ...