Iceberg Collision
Courtesy of Nature Noted, comes this article on two enormous blocks of ice set to collide in the next week in Antarctica.
As the Nasa site linked above puts it:
It is an event so large that the best seat in the house is in space: a massive iceberg is on a collision course with a floating glacier near the McMurdo Research Station in Antarctica. NASA satellites have witnessed the 100-mile-long B-15A iceberg moving steadily towards the Drygalski Ice Tongue. Though the iceberg's pace has slowed in recent days, NASA scientists expect a collision to occur no later than January 15, 2005.