The magnitude 8.8 quake that slammed central Chile February 27 knocked the entire planet for a loop — literally. The sudden, large-scale movement of tectonic plates that triggered the quake shifted ...

While the Milankovitch Cycles operate on timescales far longer than human lifespans, their effects are always at play.

Climate scientists are warning that global warming could trigger a cascade of "tipping points" that threaten to plunge our planet into chaos. But what exactly are tipping points, what happens if we ...