In a first, researchers have recorded countless "ice quakes" that sporadically shake the Greenland Ice Sheet. These quakes may explain the jerky way that the island's frozen rivers move downstream ...

Scientists record ice quakes inside Greenland Ice Sheet, revealing new insights This is the first time that scientists have recorded thousands of tiny ice quakes deep inside the Greenland Ice Sheet.

Back up so you can stay free and continue to record the incident. But what if ICE agents don't want you to record at all, and you suspect that a First Amendment argument will make little headway ...